System Administrator jobs in United Kingdom

We are seeking a Systems Engineer to join a growing technical architecture practice, working on complex and secure IT programmes across defence, security and government environments. You’ll be part of a high performing team delivering innovative, mission critical solutions.

You will support the design, development and delivery of secure systems, working from requirements analysis through to architecture, implementation, test and integration. The work is diverse, fast-paced and highly collaborative, involving engineers, architects, analysts and client stakeholders.

• Contribute to technical architectures, specifications and engineering designs.
• Develop test, integration, verification and validation plans.
• Work across multiple lifecycle stages in dynamic delivery environments.
• Communicate clearly with both technical and non-technical stakeholders.
• Support the development of engineering capability within the practice.
• Mentor junior engineers and contribute to internal knowledge sharing.
• Engage with clients and support business development where required.

You will bring structured engineering thinking, strong communication skills and the ability to deliver high quality work independently or as part of a team. Experience within defence, national security or secure government environments is highly desirable.

• Experience managing and refining requirements; strong stakeholder engagement.
• Background in Defensive Cyber, Enterprise Architecture or Secure System Design.
• Verification and validation experience on complex technology projects.
• Model-Based Systems Engineering experience (ArchiMate, UML/SysML).
• Requirements management tooling experience (e.g., DOORS or equivalent).

• MOD delivery experience or familiarity with MOD architecture views.
• Understanding of system security principles.
• Agile delivery experience.
• Prior consultancy experience.

• Degree in Engineering, Computer Science or related technical field.
• INCOSE ASE/IEng/CEng or equivalent professional registration.
• Experience with enterprise architecture frameworks (e.g., TOGAF)

You’ll work on some of the most complex and secure enterprise scale IT programmes in the UK, with opportunities to expand your technical and consulting skills while collaborating with specialists across cyber, P3M and architecture disciplines.

• Discretionary 10% bonus
• Annual training fund
• EV scheme
• Private medical care
• Competitive pension