Site Reliability Engineer (DV Security Clearance)

Design and deploy scalable, secure, and fault tolerant cloud environments across AWS, Azure, or GCP-optimising for performance, availability, and cost efficiency.

• Enterprise Cloud Migrations Lead migrations of legacy systems (e.g. lift and shift, re architecture) seamlessly to the cloud with minimal downtime.

• Automation & Infrastructure as Code (IaC) Use Terraform, CloudFormation, Ansible, or similar tools to automate cloud resource provisioning, CI/CD pipeline deployments, and configuration management.

• Security & Compliance Oversight Implement IAM, encryption, VPC/NSG policies and ensure compliance with standards (e.g. GDPR, ISO 27001, SOC 2) across cloud environments.

• Monitoring, Optimization & Cost Governance Continuously monitor workloads using tools like CloudWatch, Prometheus, Datadog; drive performance tuning and cost optimisation (rightsizing, reserved instances, auto scaling).

• Disaster Recovery & Business Continuity Planning Develop and test backup/DR strategies, restore drills, and self healing infrastructure to ensure reliability and uptime.

• Collaboration & Knowledge Sharing Work closely with DevOps, development, security and operations teams; prepare architecture/design documents, network diagrams, runbooks and training materials.

We are seeking a highly skilled and motivated Site Reliability Engineers to join our team. The ideal candidates will possess a good understanding of engineering principals, and broad understanding of full-stack software technologies, with hands-on expertise in application development, and tooling within a secure/on-prem environment, combined with a passion for application of best practices., * Cloud Platforms: Hands on experience with AWS, Azure, or Google Cloud Platform.

• Infrastructure Automation: Proficiency with Terraform, CloudFormation, Ansible or equivalent IaC tools.
• Containerisation & Orchestration: Experience deploying and managing Docker and Kubernetes clusters (EKS, AKS, GKE or on prem).
• Programming / Scripting: Competent in Python, Bash, PowerShell or similar, for automation and tooling.
• Networking & Storage: Strong understanding of VPC architecture, subnets, firewalls, load balancers, and storage tiers.
• DevOps & CI/CD: Experience building pipelines with Jenkins, GitLab CI/CD, GitHub Actions or Azure DevOps.
• Security & Compliance: Implement and monitor IAM, encryption, audit logging, network isolation, and compliance frameworks.
• Monitoring & Optimization Tools: Familiarity with CloudWatch, Grafana, Datadog, Prometheus, ELK or similar

The position requires team members to work from client-site to ensure the reliability and availability of critical systems.

• DevOps
• English
• GitLab
• Kubernetes
• Cloud Native Development

Together, as owners, let's turn meaningful insights into action.

£80,227 per year - estimated ? Full time NEW CGI UK Careers - Your mission found here By playing this video you consent to Google/YouTube processing your data and using cookies - Learn more.

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.

*** Applicants Must be solely UK National and already hold HMG HLC clearance ***

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.