Infrastructure Architect (DV Security Clearance)

Position Description

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 a UK ‘Best Employer’ by the Financial Times. 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.

Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This position will be based on site near Chippenham 5 days a week.

Your future duties and responsibilities

In this role, you will design, build, and maintain end-to-end infrastructure across cloud and on-premises environments, ensuring solutions are scalable, resilient, and aligned with business and technical requirements. You will take ownership of architecture design models, guiding delivery teams through implementation while ensuring consistency with enterprise standards and best practices.

You will also play a key role in maintaining infrastructure performance and stability, proactively monitoring systems, supporting incident resolution, and contributing to continuous improvement. Working closely with stakeholders, you will provide technical assurance, participate in governance processes, and ensure all designs reflect current and target state environments.

• Lead & design end-to-end infrastructure architecture for cloud and hybrid systems
• Produce & maintain high- and low-level design documentation
• Guide & support infrastructure build, provisioning, and configuration activities
• Enable & promote Infrastructure as Code (IaC) best practices
• Monitor & optimise infrastructure performance, capacity, and availability
• Maintain & update architecture diagrams and design artefacts
• Support & resolve incidents, including root cause analysis
• Ensure & uphold security, compliance, and governance standards
• Contribute to architecture reviews, decision-making, and change control

Required Qualifications To Be Successful In This Role You should bring strong experience in infrastructure architecture across cloud and on-premises environments, with the ability to design scalable, resilient systems and communicate effectively with both technical and non-technical stakeholders. A solid understanding of governance, performance management, and modern infrastructure tooling is essential.

• Proven experience designing and maintaining infrastructure architecture
• Strong ability to produce high-quality architecture documentation
• Experience with scalable, highly available system design
• Ability to manage infrastructure performance, capacity, and availability
• Strong stakeholder communication and decision-making skills
• Experience with Kubernetes (including VKS)
• Familiarity with security, compliance, and governance frameworks

Desirable:

• Experience within Defence environments
• Exposure to hybrid or multi-cloud architectures
• Participation in architecture boards or governance forums
• Cloud certifications
• Automation experience using Ansible

Together, as owners, let’s turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team—one of the largest IT and business consulting services firms in the world.