Site Reliability Engineers; DV Security Clearance

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Job Description Site Reliability Engineers (DV Security Clearance)

CGI was recognised in the Sunday Times Best Places to Work List 2025 and named one of the World's Best Employers by Forbes. We offer a competitive salary, excellent pension, private healthcare, and a share scheme (3.5% + 3.5% matching), making you a CGI Partner rather than just an employee. We are committed to inclusivity and building a genuinely diverse community of technology professionals.

CGI's Space, Defence and Intelligence business unit delivers innovative, mission-critical solutions to some of the UK government's most complex and challenging problems. We design, build, and operate bespoke, secure systems that help keep the nation safe and secure. Our work spans cloud, on-prem, and hybrid environments, underpinned by strong cyber and engineering best practices.

We are seeking experienced Site Reliability Engineers to join our cross-functional teams supporting secure, cloud-based and big-data platforms. Working closely with clients and internal delivery teams, you will help design, build, operate, and continuously improve highly reliable, scalable systems within a secure environment.

Due to the nature of the work, this role requires onsite attendance and applicants must be solely UK Nationals (not dual nationals and not visa holders) with existing HMG DV / HLC clearance.

• Architect, build and operate cloud infrastructure
• Design and deliver secure, scalable, fault-tolerant infrastructure across AWS (and potentially Azure/GCP), optimised for performance, availability, and cost.
• Support and operate live systems
• Maintain deployment environments, support production systems, and manage changes to live services in mission‑critical environments.

• Languages & Scripting:
  Java, Python, Go, JavaScript (Type Script), Bash
• Frontend:
  Vue
• CI/CD & Automation:
  Jenkins, Git Lab CI, Ansible, Cucumber
• Cloud & Platforms: AWS, Open Shift, Linux
• Infrastructure as Code:
  Terraform
• Data & Streaming:
  Apache Ni Fi
• Monitoring & Logging:
  Grafana, ELK Stack, Sonar Qube
• Version Control:
  Git Lab

• Automate infrastructure provisioning, configuration, and CI/CD pipelines using Terraform, Ansible, Cloud Formation, and scripting languages.

• Build, maintain, and improve CI/CD pipelines using Jenkins, Git Lab CI/CD, and related tooling.

• Implement and manage monitoring, logging, alerting, and performance optimisation using tools such as Grafana, ELK Stack, Cloud Watch, Prometheus, and Sonar Qube.

• Implement IAM, encryption, network controls, and secure configurations in line with government and industry standards (e.g., GDPR, ISO 27001).

• Design and test backup, disaster recovery, and self‑healing strategies to ensure system reliability and availability.

• Work closely with development, Dev Ops, security, and operations teams; produce runbooks, architecture documentation, and knowledge‑sharing materials.

• Proven experience as a Site Reliability Engineer, Dev Ops Engineer, or similar role supporting cloud-based or secure systems
• Strong automation and scripting skills (Python, Bash, Go, or similar)
• Hands‑on experience with CI/CD pipelines (Jenkins, Git Lab CI/CD, etc.)
• Strong knowledge of Infrastructure as Code (Terraform, Cloud Formation, Ansible)
• Solid understanding of AWS and cloud‑native architectures
• Experience with Linux-based environments and production troubleshooting
• Familiarity with containerisation and orchestration (Open Shift or Kubernetes)
• Experience with monitoring, logging, and observability tools
• Comfortable supporting live services in production environments
• Strong communication skills and a proactive, problem‑solving mindset

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…