Sr. Estimator

Benefits

Parental leave

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Family-building benefits

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Mental health support

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Childcare support

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401(k) match

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Schedule

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Weekend work

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Application

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Deadline

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About this role

Sr. Estimator 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. Role Overview Mariana Minerals is seeking an experienced and detail-oriented Sr. Estimator to lead cost estimation efforts for mining and mineral processing projects. This role is responsible for developing accurate, competitive, and timely cost estimates that support strategic decision-making and project success. What You'll Do - Lead the preparation of detailed cost estimates for mining, processing, and infrastructure projects - Analyze drawings, specifications, proposals, and other documentation to prepare time, cost, materials, and labor estimate - Utilize RSMeans data and tools to develop accurate and benchmarked cost estimates - Collaborate with engineering, procurement, and project management teams to ensure accurate and comprehensive estimate - Develop and maintain cost databases, benchmarks, and estimating tools - Identify project risks and opportunities, providing mitigation strategies - Review and validate subcontractor and supplier quotes - Participate in bid reviews, value engineering, and project planning sessions - Provide ongoing cost analysis and support throughout the project lifecycle - Mentor junior estimators and contribute to continuous improvement initiatives - Support the PCM and Software Engineering teams in developing operating systems and tools to automate estimating processes What You'll Bring

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