Senior Complex Systems Engineer – Digital Systems Assurance

Title

Senior Complex Systems Engineer – Digital Systems Assurance

Bristol, Burton-on-Trent, Glasgow, or Leatherhead

£65,000 – £75,000 (depending on experience)

30th March 2026 – we encourage early applications

Would you like to contribute your skills to advancing high-integrity digital systems? Do you want to apply your skills and experience to shape the future of high-integrity digital systems?

At Frazer-Nash, we support clients with their toughest challenges - from advanced aerospace programmes to national defence capability. We help them navigate complexity, assure safety, and deliver systems that must work first time, every time.

We’re hiring a Senior Complex Systems Engineer to join our Digital Systems Assurance team. If you secure this role, you’ll contribute to nationally significant programmes, work with the latest safety‑critical systems, and grow your impact as a trusted technical leader.

• Work on some of the UK’s most complex and innovative systems
• Collaborate with MOD, OEMs, Primes, and regulators
• Shape next-generation and in-service technologies
• Inform both technical direction and strategic decisions
• Thrive in a consultancy environment solving real-world challenges

• Oversee the development and assurance of high‑integrity, safety‑critical systems
• Guide clients through regulatory standards (e.g. ARP
  4754A, DO‑178C, DO‑254)
• Apply MBSE and architecture modelling to support design and assurance strategies
• Engage senior stakeholders to define and deliver effective solutions
• Contribute to business development and major national programmes

• Experience developing or assuring safety‑critical systems (typically software and / or hardware in aerospace, defence, or similar)
• Knowledge of standards such as ARP
  4754A, DO‑178C, DO‑254, DO‑326A, IEC 61508, or MOD DEF STANs
• Solid systems thinking and experience with MBSE tools (e.g. Cameo, Sparx EA, SysML/UML)
• Clear communication skills and a strategic mindset

• CEng (or working towards) / ESEP / CSEP
• Relevant engineering or technical degree
• Experience with MOD acquisition frameworks or OEM/Prime environments
• Engineering consultancy background or experience

• Flexible Working:
  We are happy to discuss flexible working arrangements.
• Generous Holiday Entitlement: 25 days (plus bank holidays), with a holiday purchase scheme.
• Company Pension Scheme
• Targeted Professional Development
• Life Assurance
• Private Healthcare Membership
• Performance‑Linked Bonus Scheme
• Paid Membership Fees to a Professional Institution
• Support in Attaining Professional Membership
• Cycle to Work Scheme
• Share Purchase Scheme
• Season Rail Ticket Loan

Due to the nature of our work, candidates must meet UK National Security Vetting criteria.