Job Description As a Principal Systems Design Engineer, you will be a key engineering lead shaping the architecture and design of advanced C4I systems for critical defence programmes. This role seeks leadership elements for an experienced systems engineer who thrives on solving complex challenges, influencing strategy, and mentoring others. You will drive innovation, ensure technical excellence, and deliver integrated solutions that meet demanding operational requirements. Lead system architecture and design for complex, mission-critical defence systems, translating operational concepts into robust solutions. Define and implement technical strategy, ensuring alignment with programme objectives and future capability needs. Guide design reviews and ensure technical integrity throughout the lifecycle, including integration of specialty disciplines (Safety, Security, Human Factors, ILS, Training). Conduct trade studies, performance modelling, and evaluate emerging technologies to inform strategic decisions. Mentor junior engineers and engage with senior stakeholders, including MoD representatives, to influence programme-level decisions. Click here for the full job description