Senior System Engineer

If you’re someone who enjoys getting hands‑on with complex systems, solving real engineering challenges and seeing your work make a tangible difference, this could be exactly what you’re looking for. You’ll be joining a stable, well‑funded defence engineering organisation with a genuinely supportive team culture, long‑term programmes and proper investment in people. It’s the kind of environment where you’re trusted, developed and given the space to grow.

• Salary up to £60,000 depending on experience
• Company bonus of up to £2,500 per year
• Pension contributions up to 14% combined
• Up to 15 additional flexi leave days
• Flexible working arrangements
• Enhanced parental leave, including up to 26 weeks for maternity, adoption and shared parental leave, plus enhanced paternity, neonatal leave and fertility support
• Excellent site facilities including subsidised meals and free parking

As a Functional Integration Lead Engineer, you’ll support the Head of Functional Integration in delivering compatibility and software integration activities across complex missile and weapon systems.

This is a hands‑on, practical role where you’ll be planning and conducting integration and compatibility proving activities, developing a deep understanding of how systems and subsystems interact in real operational configurations.

You’ll work closely with project customers and stakeholders to achieve key design verification milestones and contribute to qualification campaigns. It’s varied, technical and genuinely impactful work.

• Planning and delivering proving tests aligned to programme maturity milestones
• Supporting timely clearance and certification for trials activities
• Collaborating with systems and design teams to derive robust test requirements
• Overseeing generation of test instructions, reports and supporting safety documentation
• Integrating multiple missile and launcher variants in trials and operational configurations
• Supporting integration of trials test equipment
• Coordinating with design teams to diagnose issues and define solutions
• Supporting defect investigations and data analysis
• Defining test and trials equipment requirements

You’ll also contribute to developing best practice across integration and proving activities, helping strengthen overall capability while building your own technical leadership skills.

• Degree qualified in Electrical or Electronic Engineering or similar
• Strong understanding of hardware and software integration and test activities
• Experience using commercial lab test equipment
• Familiarity with data analysis tools and methods
• Experience or interest in scripting, such as Python
• Logical problem‑solving skills and a practical mindset
• Adaptability and the confidence to work in a fast‑paced engineering environment

British Citizen or Dual UK national with British citizenship required.

Successful candidates will need to undergo BPSS checks following offer stage.

You’ll be part of a collaborative Integration and Systems Validation team delivering challenging, high‑profile programmes. In return, you’ll receive long‑term career stability, structured development, strong benefits and the chance to work on complex systems that genuinely matter.

If you’d like to have an informal chat before applying, I’d be happy to arrange one.

For more information, please contact Jamie at The ONE Group’s Engineering & Manufacturing Division by