Principal Systems Engineer

Benefits

Parental leave

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Non-birth-parent leave

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Family-building benefits

• Fertility benefits: Not verified
• Adoption assistance: Not verified
• Surrogacy assistance: Not verified

Mental health support

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Relocation assistance

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Childcare support

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Learning budget

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Verification

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Salary

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Market context

U.S. role benchmark (BLS OEWS)

$116,543 U.S. median for this role

Projected growth (BLS Employment Projections)

+9.8% - Much faster than average

Matched to SOC 15-1252 - Software Engineering aggregate by role bucket.

Source: U.S. Bureau of Labor Statistics, OEWS, May 2024 and Employment Projections, 2024-2034.

Role

Role function

Engineering From the posting source checked Jun 20, 2026

Seniority

Principal From the posting source checked Jun 20, 2026

Schedule

Shift type

Not verified

Weekend work

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Company

Company stage

Public-company From the posting source checked Jun 20, 2026

Application

Cover letter

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Assessment

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Deadline

Not stated

Where they hire

State eligibility is not yet verified.

About this role

Principal Systems Engineer Hemel Hempstead, England, United Kingdom Company Description: Smiths Detection is a global leader in threat detection and screening technologies supporting aviation, ports & borders, defence, and urban security. With 5 R&D centres, 21 global offices, and 7 manufacturing sites, our 3,000 brilliant minds have spent over 40 years at the frontline, developing solutions that protect society from explosives, prohibited weapons, contraband, toxic chemicals, and narcotics. Every minute of every day, our technology and people help make the world a safer place. 👉 Learn more about what we do: https://youtu.be/JmcKLJTrHLc Job Description: We are seeking a delivery‑focused Principal Systems Engineer to act as the systems lead on a UK defence programme. This role is not focused on hands‑on mechanical or electronic design. Instead, it centres on owning requirements, verification, and compliance, and ensuring all engineering outputs align precisely with customer and regulatory expectations. You will be the person who knows the system inside out and can confidently stand behind it with customers. This role suits someone who is: Highly detail‑oriented Comfortable working independently Happy spending time reading, checking, and validating documentation Confident engaging directly with customers in a clear, factual manner You will work closely with engineering, science, test and production teams, but your focus will be on requirements, verification, and evidence, rather than active design. Responsibilities will include: Owning system requirements and ensuring full traceability through verification Managing and delivering the systems compliance matrix Compiling and reviewing verification evidence across Technology Comparing test reports, design documents and

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