Systems Engineer – Requirements Lead (Defence) - UAV

Infinity Systems Engineering LTD.; West of England; Hybrid; GBP 65,000 - 90,000; Full time

Job summary

Infinity Systems Engineering is seeking a Senior Systems Engineer / Requirements Lead to support a MOD defence capability development programme. You will lead requirements engineering activities, translating operational needs into measurable technical requirements and overseeing verification and validation activities.

Based in Bristol (Abbey Wood) with hybrid working, the role involves engaging MOD stakeholders and industry partners to govern and assess complex defence systems and UAV-related

Qualifications

• Proven Systems Engineering experience within Defence.
• Strong background in requirements capture, analysis, management and traceability.
• Knowledge of systems engineering lifecycle processes and V&V.
• Experience supporting technical reviews and engineering governance.
• Current SC Clearance is mandatory.

Responsibilities

• Develop, manage and maintain system-level requirements across complex Defence programmes.
• Translate operational needs into clear, measurable technical requirements and acceptance criteria.
• Establish requirements traceability and verification methodologies.
• Support technical evaluation of industry proposals and engineering solutions.
• Conduct technical assessments and contribute to design reviews and technical governance.
• Develop verification and validation (V&V) strategies and supporting documentation.
• Support test and trial planning, including technical assessment of results.
• Engage with MOD stakeholders, suppliers and multidisciplinary engineering teams.

Skills

Systems Engineering

Requirements capture

Traceability

Lifecycle & V&V

Governance & reviews

Stakeholder management

SC Clearance

Job description

Senior Systems Engineer – Requirements Lead (Defence)

Location

Bristol (Abbey Wood) – Hybrid Working

Contract

Inside IR35

Duration

1 December 2026 – 31 March 2027 with possible extensions

Security Clearance

Current SC Clearance Essential

About The Role

Infinity Systems Engineering is seeking an experienced Senior Systems Engineer / Requirements Lead to support an exciting MOD Defence capability development programme. The successful candidate will lead requirements engineering activities, supporting the development and demonstration of next‑generation Defence systems, including UAV‑mounted capabilities. Working alongside MOD, DSTL and industry partners, you will play a key role in requirements definition, technical assessments, engineering governance and verification and validation activities.

Key Responsibilities

• Develop, manage and maintain system‑level requirements across complex Defence programmes.
• Translate operational needs into clear, measurable technical requirements and acceptance criteria.
• Establish requirements traceability and verification methodologies.
• Support technical evaluation of industry proposals and engineering solutions.
• Conduct technical assessments and contribute to design reviews and technical governance.
• Develop verification and validation (V&V) strategies and supporting documentation.
• Support test and trial planning, including technical assessment of results.
• Engage with MOD stakeholders, suppliers and multidisciplinary engineering teams.

Essential Skills & Experience

• Proven Systems Engineering experience within Defence.
• Strong background in requirements capture, analysis, management and traceability .
• Knowledge of systems engineering lifecycle processes and V&V.
• Experience supporting technical reviews and engineering governance.
• Ability to assess complex technical information and provide practical engineering recommendations.
• Strong stakeholder management and communication skills.
• Current SC Clearance is mandatory.

Experience Developing Technical Requirements And Acceptance Criteria.

• Knowledge of systems engineering lifecycle processes and V&V.
• Experience supporting technical reviews and engineering governance.
• Ability to assess complex technical information and provide practical engineering recommendations.
• Strong stakeholder management and communication skills.
• Current SC Clearance is mandatory.

Desirable Experience

• Experience within Ordnance, Munitions and Explosives (OME) or Defence weapons systems.
• Knowledge of ISO/IEC/IEEE 15288 and systems engineering methodologies.
• Experience Using Requirements Management Tools Such As DOORS.
• Exposure to Defence trials, experimentation or demonstration programmes.
• Knowledge of UAV platforms, payloads or lethality‑related capability development.
• Previous experience working with MOD, DSTL or QinetiQ.

Additional Information

Hybrid working based around MOD Abbey Wood, Bristol, with occasional travel to DSTL and stakeholder locations. Initial contract until 31 March 2027. Inside IR35 engagement. Working on a high‑profile Defence technology and capability development programme.

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