Mariana Minerals jobs

Project Engineering Manager - Houston Houston, TX, Houston, Texas, US About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply. The Role Mariana Minerals is looking for a highly motivated Project Engineering Manager to work on building the critical minerals supply chain to support the world's energy transition. In this role, you will manage design, tasks, and the flow of information across internal and external engineering teams for your assigned project(s). You will develop and maintain project workflows, lead project-specific design activities, support document control processes, managing engineering deliverables, coordinate cross-discipline reviews, manage approvals, and provide progress updates. What You'll Do - Manage engineering activities across internal engineering teams, external engineering partners, and vendors - Take a hands-on approach in developing project-level designs and associated documentation. - Manage review/approval workflows for engineering documents, vendor submittals, and project deliverables - Coordinate cross-discipline engineering reviews, ensuring timely engagement from process, mechanical, structural, piping, electrical, instrumentation, and construction teams - Track engineering deliverables and action items, maintaining up-to-date logs, trackers, and registers to ensure alignment with the project schedule - Lead technical interface management, resolving gaps and issues between disciplines, vendors, and EPC partners - Organize and lead model reviews, design reviews, and

Contract Piping Designer San Francisco HQ, San Francisco, California, US, Houston, TX About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply. Role Overview Mariana Minerals is looking for a Contract Piping Designer to work on building the critical minerals supply chain. As a Piping Designer at Mariana Minerals, you will lead the configuration of projects in AutoCAD Plant 3D (or similar software packages), develop best practices and workflows for drafting and modeling, and support drafting and modeling activities from conceptual engineering through to detailed design. What You'll Do - Configure new projects in AutoCAD Plant 3D - Setup Data Manager and Smart P&IDs - Draft process flow diagrams (PFDs) - Configure and draft smart piping and instrumentation diagrams (P&IDs) - Develop and draft plot plans - Define requirements for third party 3D equipment models and P&IDs to integrate into Mariana Minerals hosted AutoCAD Plant 3D environment - Define requirements for third party EPC companies to complete detailed engineering What You'll Bring - 5+ years of experience with AutoCAD Plant 3D - CAD admin experience - 2D drafting experience. PFDs, P&IDs, Plot Plans, etc. - 3D modeling experience. Piping design, isometric generation, etc. Why Join Us? At Mariana Minerals, you'll

Drilling Engineer, Exploration & Resource Automation Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply. Role Overview We are hiring a Drilling Engineer, Exploration & Resource Automation to help build and implement the automated drilling, sampling, QA/QC, and resource workflows inside MarianaOS. This role sits at the intersection of drilling, geology, resource estimation, field operations, and software product development. You will work closely with Mariana Minerals' software team to translate real-world exploration and drilling workflows into scalable software tools, automated systems, and practical field-to-model solutions. The focus is not only to execute drilling programs, but to help automate how those programs are planned, tracked, sampled, analyzed, reconciled, and optimized across greenfield, brownfield, infill, resource definition, and new drilling campaigns. The ideal candidate has a strong geology, drilling, resource modeling, and resource estimation background, plus a strong motivation to automate manual workflows and build better tools for technical teams. Experience with sediment-hosted copper, sandstone-hosted copper, red-bed copper, stratiform copper, or similar deposits is helpful, but not required. Experience creating products, internal tools, technical solutions, dashboards, workflows, or software-enabled processes is a meaningful asset. You will work on Copper One, a real sedimentary copper project

Hydrometallurgical Process Engineer San Francisco HQ, San Francisco, California, US, Houston, TX About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply. The Role Mariana Minerals is looking for a highly motivated Hydrometallurgical Process Engineer to work on building the critical minerals supply chain to support the world's energy transition. As a Hydrometallurgical Process Engineer at Mariana Minerals, you will lead the development and deployment of first-of-its-kind chemical refining processes, while also supporting development of software for capital project execution and automated plant optimization. Responsibilities will include leading equipment scopes from concept through to design, installation, commissioning, ramp, and handover to the operations team. What You'll Do - Lead hydrometallurgical process equipment scopes from concept development and modeling validation through procurement, detailed engineering, fabrication, installation, commissioning, and ramp-up - Manage external technology licensors, equipment vendors, and engineering partners to deliver fully integrated and performant hydrometallurgical refining systems - Develop detailed heat and material balances for complex hydrometallurgical process trains, including leaching, solution purification, solvent extraction/ion exchange, precipitation, crystallization, and residue handling - Build hydraulic models and process flow diagrams/P&IDs for hydrometallurgical circuits, ensuring operability, reliability, and safety - Create first-principles models of chemical reactors and unit operations (e.g., leach reactors,

Sr. Pyrometallurgical Process Engineer San Francisco HQ, San Francisco, California, US, Houston, TX About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role Mariana Minerals is looking for a highly motivated Pyrometallurgical Process Engineer to help build the critical minerals supply chain supporting the world's energy transition. As a Pyrometallurgical Process Engineer at Mariana Minerals, you will lead the development and deployment of first-of-its-kind high-temperature refining and thermal processing systems. You will play a central role in designing, modeling, scaling, and commissioning pyrometallurgical unit operations, while supporting development of software tools for capital project execution and automated plant optimization. Responsibilities include leading equipment and process scopes from concept and modeling validation through detailed engineering, installation, commissioning, ramp-up, and handover to operations. What You'll Do - Lead pyrometallurgical process scopes from early concept development and thermodynamic modeling through procurement, detailed engineering, fabrication, installation, commissioning, and ramp-up - Develop detailed heat and material balances for high-temperature process trains, including drying, calcination, roasting, reduction, smelting, converting, slag cleaning, refining, and off-gas treatment - Design and validate thermal process flowsheets and PFDs/P&IDs for pyrometallurgical circuits, ensuring safety, reliability, and scalability - Build first-principles thermodynamic and kinetic models for high-temperature reactors and furnaces (e.g., rotary kilns, calciners, electric arc furnaces, submerged arc furnaces, reverberatory furnaces, flash smelters) to

Engineering Manager, Piping & Stress Analysis Houston, TX, Houston, Texas, US About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply. The Role Mariana Minerals is looking for a highly motivated Engineering Manager, Piping & Stress Analysis, with experience managing a piping design department, completing pipe stress analysis, and developing and implementing pipe, pipe support, and valve specifications. Mariana Minerals is building the critical minerals supply chain to support the world's energy transition. As an Engineering Manager, Piping & Stress Analysis at Mariana Minerals, you will lead the development and deployment of first-of-its-kind chemical refining processes, while also supporting development of software for capital project execution and automated plant optimization. Responsibilities will include leading basic and detailed engineering strategies, managing external engineering firms, staff-aug contractors, and internal teams, developing issued-for-construction engineering packages for piping and static equipment. What You'll Do - Lead and manage a piping team of internal, staff-aug, high-value engineering center, and third party engineering firm piping designers - Oversee execution of piping engineering deliverables across multiple projects - Establish and maintain piping design standards, specifications, and best practices - Perform pipe stress analysis using Caesar II, including flexibility analysis, thermal expansion, and load cases - Conduct dynamic

Process Engineering Intern San Francisco HQ, San Francisco, California, US About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role We are hiring a Process Engineering Intern to work on real, high-impact problems within the Pilot Plant Operations team in San Francisco. You will contribute directly to benchtop experiments, pilot plant test runs, and the creation of key plant operational programs, working closely with engineers and domain experts. This role is designed to provide hands-on experience building and shipping solutions, not just supporting tasks. What You'll Do - Drive experiments in the lab and pilot plant to de-risk scaleup of critical minerals processing steps - Build, test, and iterate on solutions to increase product recovery, decrease equipment downtime, controls costs, and improve health & safety - Collaborate with engineering, management, and software engineering to build programs and applications for Mariana's operations teams - Collaborate with cross-functional team members (engineering, operations, analytical lab, etc) - Present outcomes and learnings at the end of the internship Desired Qualifications - Currently pursuing or recently completed degree in chemical engineering, metallurgy, materials science, or a related field - Strong fundamentals in process design, thermodynamics, and reaction engineering - Hands-on experience in a laboratory, pilot plant, or commercial scale plant through previous projects, coursework, and/or internships - Ability

Safety Specialist/Engineer Moab, UT, Moab, Utah, United States Safety Specialist/Engineer Location: Copper One, Moab, UTAH About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. The Role We are seeking a Safety Specialist/Engineer to be responsible and accountable for the site's safety, health, and security, along with assisting in developing, implementing, and sustaining good safety and health practices for our team. This role is responsible to ensure that safety standards and procedures are followed by all mine personnel in compliance with company, state, and federal Mine Safety and Health Administration (MSHA) rules and regulations. Copper One is a 24/7/365 open pit mining operation with an excellent safety performance and compliance record. The ideal candidate combines OSHA and MSHA expertise and experience having acted as a Safety Specialist or Safety Engineer in mining operations. What You'll Do - Lead by example, in all safety processes, ensuring complete safe

Mechanical Engineering Intern San Francisco HQ, San Francisco, California, US About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role We are hiring a Mechanical Engineering Intern to work on real, high-impact problems within the Pilot Plant Operations team in San Francisco. You will contribute directly to design, improvement, and optimization of benchtop pilot plant equipment, working closely with engineers and domain experts. This role is designed to provide hands-on experience building and shipping solutions, not just supporting tasks. What You'll Do - Create 3D models, layout drawings, and other critical documentation for equipment in the lab and pilot plant - Build, test, and iterate on hands-on mechanical solutions to improve equipment performance, decrease equipment downtime, controls costs, and improve health & safety - Collaborate with engineering, management, and software engineering to build programs and applications for Mariana's operations teams - Collaborate with cross-functional team members (engineering, operations, controls engineering, etc) - Present outcomes and learnings at the end of the internship Desired Qualifications - Currently pursuing or recently completed degree in mechanical engineering or a related field - Strong fundamentals in mechanical design documentation such as equipment specifications, layout drawings, piping schematics, and CAD models - Hands-on experience designing or supporting industrial equipment including pumps, piping systems, reactors, separators, filtration systems, and

Diamond/Core Driller Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. Summary The Diamond/Core Driller is responsible for safely and efficiently operating diamond drilling equipment to recover high-quality core samples for mineral exploration and geological evaluation. This role requires precision drilling, strong mechanical skills, and strict adherence to safety, environmental, and quality standards, often in remote or challenging conditions. Responsibilities - Safely operate diamond/core drilling rigs in accordance with company procedures, manufacturer guidelines, and regulatory requirements - Conduct pre-start inspections and ongoing checks of drill rigs, rods, core barrels, pumps, and support equipment - Accurately set up drill sites, align rigs, and collar holes to specified angles, depths, and locations - Monitor drilling parameters including rotation speed, bit pressure, water flow, and penetration rates to optimize core recovery and equipment performance - Ensure maximum core recovery, correct handling, and proper

RC Driller Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. Summary The Reverse Circulation (RC) Driller operates RC drilling rigs to support mineral exploration and mining programs. The role focuses on safe, efficient drilling operations, highquality sample recovery, equipment care, and compliance with health, safety, and environmental standards in often remote work environments. Responsibilities - Safely operate Reverse Circulation (RC) drilling rigs in accordance with site procedures, manufacturer specifications, and regulatory requirements - Conduct thorough pre-start inspections of drill rigs, compressors, boosters, rods, hammers, and support equipment - Perform routine servicing, lubrication, and basic mechanical troubleshooting to minimize downtime - Accurately collar holes and maintain correct drilling angles, depths, and alignment per drilling plans - Monitor and adjust drilling parameters such as air pressure, rotation speed, bit wear, and penetration rate to optimize productivity and sample quality - Ensure

Sr. Site Development Engineer San Francisco HQ, San Francisco, California, US About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role Mariana Minerals is seeking a highly motivated Sr. Site Development Engineer to lead the planning and design of greenfield project sites. In this role, you will be responsible for end-to-end site development-from early-stage site selection and feasibility through detailed engineering and construction execution-for first-of-its-kind mining and metallurgical processing facilities. You will work cross-functionally across engineering, construction, and project delivery teams to ensure sites are designed for constructability, scalability, and long-term operational performance. You will lead civil, grading, drainage, utilities, and site infrastructure design, manage external engineering partners, and support the development of internal tools and workflows for efficient capital project execution. What You'll Do - Develop and optimize site layouts, including grading, drainage, stormwater management, access roads, and utility corridors - Drive early-stage site selection, feasibility studies, and due diligence, including topography, geotechnical constraints, permitting considerations, and infrastructure access - Design and review earthwork plans, cut/fill balancing, and mass grading strategies to optimize cost and constructability - Coordinate site infrastructure systems including roads, drainage, underground utilities, and tie-ins to external infrastructure - Manage and coordinate external engineering firms, consultants, and contractors supporting civil and site development scopes - Oversee development of issued-for-construction

RC Drill Assistant Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. Summary The RC Driller Assistant supports the RC Driller in all aspects of reverse circulation drilling operations. This position involves assisting with equipment setup, sample collection, maintenance, and general site duties. The role requires physical strength, attention to safety, and the ability to work in remote, outdoor environments while contributing to efficient and accurate drilling operations. Responsibilities - Assist in the setup, operation, and teardown of RC drilling rigs and equipment - Handle drill rods, hammers, and tooling during drilling operations - Support sample collection, ensuring proper handling, labeling, and storage - Assist with operation of compressors, boosters, and air systems - Mix and manage drilling fluids when required - Perform routine maintenance and cleaning of drilling equipment - Load and unload equipment, tools, and supplies - Maintain

Diamond/Core Driller Assistant Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. Summary The Diamond/Core Driller Assistant supports drilling operations by assisting the Lead Driller with equipment setup, operation, maintenance, and site activities. This role requires physical endurance, attention to safety, and the ability to work in remote outdoor environments. The assistant plays a key role in ensuring efficient and safe core drilling operations. Responsibilities - Assist with setup, operation, and teardown of diamond/core drilling rigs - Handle drill rods, tooling, and core barrels during drilling operations - Retrieve, label, and store core samples accurately - Mix and manage drilling fluids and maintain circulation systems - Perform routine maintenance and basic repairs on drilling equipment - Keep the worksite clean, organized, and hazard-free - Load and unload equipment, supplies, and materials - Follow all safety procedures and environmental regulations -

Drill and Blast Engineer Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. The Role We are hiring a Drill & Blast Engineer to design, execute, and optimize drilling and blasting operations at our surface copper site in La Sal, UT. In this role, you will lead blast design, oversee drilling programs, and partner closely with mine operations to deliver safe, efficient, and cost effective fragmentation that supports high performance heap leach and excavation workflows. You'll work hands on at the mine site, integrating advanced design tools, data-driven reconciliation, and continuous improvement to push the boundaries of modern blasting performance-while upholding the highest standards of safety and regulatory compliance. What You'll Do Blast Design & Optimization - Develop and refine blast patterns and charge designs tailored to specific geotechnical domains across ore and waste. - Utilize ANFO, emulsions, bulk delivery

IT Technician Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. The Role The IT Technician will provide onsite technical support at a remote mine site, ensuring the reliability, security, and performance of all technology systems that support mining operations. This role supports endusers, network infrastructure, hardware, software, communication systems, and operational technology (OT) used in the field. The technician will troubleshoot issues, perform maintenance, manage equipment inventory, and work closely with the corporate IT team to maintain compliance with company standards. What You'll Do Technical Support & Troubleshooting - Provide onsite support for desktops, laptops, tablets, mobile devices, printers, and specialized mining equipment interfaces. - Diagnose and resolve hardware, software, and network issues in a highdemand, fastpaced environment. - Assist with installation, configuration, and updates of operating systems and applications. - Support minesite users with connectivity issues, authentication, VPN

Logistics Coordinator (Mining and Recycling Operations) Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. SUMMARY The Logistics Coordinator is responsible for planning, coordinating, and overseeing the movement of materials, equipment, and supplies to and from the mine site to ensure uninterrupted mining operations. This role supports production, maintenance, and construction activities while maintaining compliance with safety, environmental, and regulatory requirements in a mining environment. RESPONSIBILITIES Logistics & Supply Chain - Coordinate inbound and outbound transportation of materials, consumables, spare parts, and heavy equipment. - Schedule and monitor deliveries to ensure materials arrive on time and in the correct quantities. - Inspect copper scrap received on site to ensure deliveries are correct. - Manage freight providers and carriers for deliveries to mine site. - Support warehousing, laydown areas, and on-site material handling activities. - Track shipments and resolve delays, damages,

Contract Building Information Modeling (BIM) Designer Houston, TX, Houston, Texas, US, remote About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply. What You'll Do - Develop, update, and maintain 2D and 3D drawings and models using AutoCAD Plant 3D, Civil 3D, and Revit - Support multi-disciplinary layouts, including: - Equipment and general arrangement plans - Civil drawing support - Maintenance of CAD standards across projects - Ensure high accuracy and quality of drawings and models, with strict adherence to project and company standards - Support BIM and digital delivery workflows, including: - Model cleanup, coordination, and standardization - Assist with automation and efficiency improvements using basic scripting and tools such as Python, PowerShell, AutoLISP - Prepare drawings and models for design reviews, construction, and field execution - Maintain organized project files, templates, and documentation in accordance with internal CAD/BIM standards - Collaborate closely with engineers, project managers, and external consultants to provide drafting and modeling support - Assist with laser scanning registration from LiDAR and SLAM based scanners What You'll Bring - 3+ years' experience as a CAD Designer, CAD Drafter, BIM Designer or similar role - Strong proficiency in AutoCAD (Civil 3D, Plant 3D Preferred) - Experience working

Leach Pad Technician Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. The Role The Leach Pad Technician is a hands on, field based role responsible for performing manual and equipment assisted labor on the leach pad to support safe and efficient copper production. You will operate heavy equipment, perform pipe welding and layout, and assist with day to day operational activities essential to maintaining optimal leach pad performance. This role requires physical stamina, adherence to safety protocols, and the ability to work in challenging outdoor conditions. You will report directly to the Leach Pad Supervisor and work closely with other technicians and process team members. What You'll Do - Weld HDPE pipe safely and effectively. - Perform daily pre-operation inspections on assigned equipment. - Operate heavy equipment including extendable boom forklifts and mini excavators. - Lay out, install, and

Staff Product Manager San Francisco HQ, San Francisco, California, US About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role We're hiring a Staff Product Manager to own a critical domain within MarianaOS. This is a single posting because we recruit for the strongest PMs first and then place them where the fit is best. Through the interview process, we'll figure out together which part of the system is the right match for your background and instincts. The scope of what we can touch is enormous. Mining is the last major industrial sector that hasn't been rebuilt with modern software. The opportunity set isn't a feature gap on an existing product - it's entire workflows and systems that don't exist yet. The problem space spans micron-scale chemistry to kilometer-scale infrastructure. Ship a feature and you can watch the needle move - recovery rates, reagent consumption, construction timelines, equipment uptime. These aren't proxy metrics. They're the actual physics of making metal. This role is On-site and will require significant travel. The Platform: MarianaOS MarianaOS is the digital nervous system for mineral projects. It spans the full lifecycle - from capital project execution through autonomous operations. The three domains make are staffing for right now are: - MineOS Integrates geologic block models, short and long-range

Process & Lab Technician Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role We are hiring a Process & Lab Technician to support the safe, efficient, and high-quality process development studies and analytical tests. In this role, you will work closely with R&D and engineering to build, operate, and maintain ore leaching columns. You will also be responsible for timely, accurate, and actionable chemical analysis of ore, process streams, and final products. You will play a critical role in bridging leaching research and laboratory analytics with plant operations, helping ensure processes are robust, efficient, and suitable for future development & scale-up. What You'll Do - Procure and construct columns and ancillary equipment used to measure copper leaching fundamentals - Drive leaching column operations including taking routine samples, troubleshooting equipment issues, and maintaining high level of cleanliness - Drive ore handling including crushing, sorting by particle size, and taking representative samples - Prepare samples for analysis using techniques such as digestion, dilution, and/or filtration - Perform elemental and compositional analysis of solid and liquid samples using ICP, NMR, XRF, Titrator, or similar analytical techniques - Document analytical results in laboratory information systems and maintain clear experimental records and material metrics using digital tools and software - Follow

Recruiting Coordinator San Francisco HQ, San Francisco, California, US About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role We are hiring a contract Recruiting Coordinator to support and scale our hiring operations across technical and business roles. This role is critical in ensuring a seamless and high-quality candidate experience while enabling our recruiters and hiring managers to operate efficiently. You'll own scheduling, coordination, and candidate communications, while helping improve recruiting processes and systems. This is a high-impact role with exposure across the company and an opportunity to help build recruiting infrastructure from the ground up. What You'll Do - Coordinate and schedule interviews across multiple time zones - Manage candidate communications throughout the hiring process - Partner with recruiters and hiring managers to ensure smooth interview workflows - Maintain accurate candidate data in the ATS - Assist with job postings and role updates across platforms - Support offer coordination and onboarding logistics - Help track recruiting metrics and pipeline health - Identify and implement process improvements in recruiting operations - Ensure an exceptional, high-touch candidate experience Desired Qualifications - 1-3 years of experience in recruiting coordination, HR, or similar operations role - Strong organizational skills and attention to detail - Ability to manage multiple priorities in a fast-paced environment - Excellent written

Field Engineering Intern Moab, UT, Moab, Utah, United States About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The Role We are hiring a Field Engineering Intern to work on real, high-impact problems within the Project Execution Team. You will contribute directly to the construction of the Lithium One refinery, working closely with engineers and domain experts. This role is designed to provide hands-on experience building and shipping solutions, not just supporting tasks. What You'll Do - Work on the construction execution of a greenfield Copper One including working with subcontractors, vendors, scheduling and budgeting resulting in successful execution of scopes. - Build, test, and iterate on solutions within MarianaOS including developing world class tracking and development of a software driven construction team. - Analyze data and field systems to identify inefficiencies, track progress against schedule, and optimize construction performance. - Collaborate with cross-functional team members including engineering, operations, and construction contractors to coordinate scope and resolve field issues. - Present outcomes, key learnings, and recommendations to the Project Execution Team at the end of the internship. Desired Qualifications - Currently pursuing a degree in Civil Engineering, Construction Engineering, or Construction Management. - Strong fundamentals in construction sequencing, reading drawings and specifications, and basic project controls. - Hands-on experience in construction, scheduling, estimating, or

Project Controls Manager Houston, TX, Houston, Texas, US Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. Our culture is built on three principles: - Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions. - Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale. - Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. Join us as we build the future of responsible mineral sourcing and supply. Position Summary We are hiring a Project Controls Manager to drive the systems, processes, and tools that ensure successful delivery of large-scale capital projects across mining and refining. This is a hands-on leadership role at the intersection of cost engineering, scheduling, risk management, and financial governance . You will partner closely with project executives, managers, engineers, and contractors to establish control frameworks, optimize project performance, and deliver predictable outcomes. This role is central to scaling Mariana's capital project execution and embedding our software-first mindset into how projects are planned, monitored, and delivered. What You'll do: - Develop, refine, and implement project controls systems, processes, and tools (cost, schedule, change, risk, progress) across large-scale mining capital projects. - Champion improvements in the Capital Project Operating System (Capital Project OS) . - Review, analyze,