Infrastructure Engineers in London

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 member 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.

CGI's Space, Defence and Intelligence business unit focuses primarily on the delivery of contemporary and innovative technical solutions for the government agencies' most challenging problems. We work, build, and operate bespoke, technically complex, mission‐critical systems which help our clients keep us all safe and secure.

We are currently looking for an experienced Infrastructure engineer to join our cross‐functional team who, in partnership with our clients, will help define, guide and assure the delivery of integrated solutions. The role offers fantastic opportunities to work within an interesting and highly rewarding environment. We are heavily committed to developing our members and provide excellent learning and development opportunities to ensure that your knowledge and skills keep pace with the evolving technology landscape.

Due to the secure nature of this project, this role requires candidates to either already hold, or be eligible to obtain, a high level of UK Security Clearance. To meet the eligibility criteria for this clearance, applicants must be sole British nationals, have been resident in the UK for the past 10 years, and must not have spent more than 28 consecutive days outside the UK within the last five years. Individuals who do not currently hold clearance are still encouraged to apply and will be considered both for this position and for other suitable opportunities within CGI where appropriate.

This role is primarily based on a secure client site and requires attendance on site five days per week due to the sensitive nature of the work and the systems involved. While the position is predominantly site‐based, there may be occasional flexibility where business needs and security constraints allow. Any such arrangements would be agreed in advance with the project team.

Your future duties and responsibilities include working on a highly secure hybrid on‐prem / cloud projects. The role is on an established fast‐moving DevSecOps team, on on‐prem, remote and multi‐cloud infrastructure, using a multitude of technologies including CloudFormation, Ansible and Terraform, Ubuntu and Windows, VPNs, firewalls, VMs, laptops, MFA, AD, monitoring, network performance, resilience and security design, plus some integration scripting and application configuration and management.

Required Qualifications To Be Successful In This Role:

• Ideally 3 years of experience of Infrastructure engineering – design, build, deploy, test and support
• Deployment across on prem and cloud infra
• Kubernetes, Containerisation, Platform Engineering
• Kubernetes architecture – pods, services, deployments and networking, software defined networking
• Scripting, e.g. Python/Shell
• Experience of Docker, including image creation, container management (including security patching) and orchestration
• Infrastructure as Code using Terraform, Ansible or CloudFormation
• Experience of cloud compute – AWS, GCP or Azure (primarily AWS)
• GitOps tooling such as Argo CD
• Infra security, compliance and governance
• Familiarity with CNCF ecosystem and building platforms on top of Kubernetes
• Container orchestration tools, e.g. Docker Swarm / Apache Mesos
• Knowledge of Service Mesh technologies, e.g. Istio / Linkerd
• Experience of monitoring tools, e.g. Prometheus, Grafana, ELK
• Rounded problem‐solving skills – troubleshoot and resolve complex infrastructure related issues
• Strong communication and collaboration skills
• Ability to work across a diverse set of stakeholders, across multiple sites
• Experience with agile development methodologies and tooling such as Git

We don't expect candidates to know everything on the list. Experience across multiple areas is desirable, the ability to learn quickly, and a willingness to contribute across the technology stack as required.

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.