Principal Architect DV Security Clearance - CGI

The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of space, defence, intelligence, aerospace and maritime, all underpinned by our end-to-end cyber capability. We work collaboratively with global technology companies, cutting edge SMEs and academia to deliver the optimal solution for each client. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the ‘World’s Best Employers’ by Forbes magazine. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you’ll be part of an open, friendly community of experts. We’ll train and support you in taking your career wherever you want it to go. Working closely with client stakeholders, delivery leaders, engineers and subject matter experts, you will help shape the overall approach for the engagement from a technology and process perspective focusing on the outcomes and value the client seeks. To support this, you will establish effective architecture governance, guide the approach and methodologies across solution architecture, infrastructure, technical architecture, security architecture and the operating model for delivery. You will work to support continuous improvement by identifying areas of opportunity and help introduce innovation in a controlled and pragmatic way within a secure defence environment. Due to the secure nature of the programme, you must be a sole UK National and currently hold UK Higher Level Clearance. This position will require you to be onsite in Chippenham 5 days per week.

Your future duties and responsibilities

• Provide principal architectural leadership and act as technical authority or design authority for a complex, secure defence software system.
• Own and evolve the overall solution architecture, ensuring it remains resilient, secure, maintainable and aligned to operational needs.
• Work with senior stakeholders both internal and external to the project, ensuring that the project and solution is accurately represented from a technology and methodology perspective.
• Lead, coach and mentor architects, technical leads, engineers and subject matter experts, building technical capability and confidence across the team.