Principal Systems Engineer

Principal Systems Engineer

£85k – with bonus and biannual pay reviews
Must hold active SC (Security clearance)

Hybrid working

Apex is proud to be partnering with an established defence consultancy that supports mission-critical programmes at the heart of UK national security. Acting as a trusted and independent advisor to the MoD, they bring decades of experience delivering insight, assurance, and technical expertise across some of the most complex defence projects.

They are now seeking a Principal Systems Engineer to join their growing team. You will support the delivery of critical defence programmes, providing systems engineering expertise across the full CADMID lifecycle. This includes designing and integrating complex systems, managing requirements, engaging with MoD stakeholders, and ensuring compliance, risk management, and thorough technical documentation.

Requirements of the Principal Systems Engineer

• Strong systems engineering experience across the full CADMID lifecycle within defence/MoD programmes.
• Expertise in system architecture, design, and MBSE methodologies.
• Proven requirements engineering and stakeholder management skills. (including MoD engagement)
• Experience integrating and testing complex systems or systems-of-systems.
• Ability to manage risk, ensure compliance, and produce clear technical documentation.

Qualification of the Principal system engineer

• 10 years minimum experience as a Systems Engineer.
• Valid/Active SC Clearance.
• Experience with requirements management within UK MoD environments and knowledge of the acquisition framework.
• Understanding of Defence Lines of Development and their impact on capability and requirements.
• Awareness of operational environments. (e.g. geography, climate, cyber, and information domains)
• Proficiency with requirements tools such as DOORS/Dimensions RM.
• Familiarity with modern Systems Engineering approaches, including MBSE.
• Ability to support business cases, requirements documentation (URD/SRD), and procurement activities.

Are you an experienced Principal Systems Engineer looking for their next exciting and innovative defence opportunity then please apply now.

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