Site Reliability Engineer; DV Security Clearance

Site Reliability Engineer (DV Security Clearance)

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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 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.

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

Role

Location:

Gloucester or Manchester

We are seeking a highly skilled and motivated Site Reliability Engineer 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.

• Architect, Build & Operate Cloud Infrastructure

  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, Cloud Formation, 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 Cloud Watch, Prometheus, Datadog; drive performance tuning and cost optimisation (rightsising, 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 Dev Ops, development, security and operations teams; prepare architecture/design documents, network diagrams, runbooks and training materials.

• Cloud Platforms:
  Hands on experience with AWS, Azure, or Google Cloud Platform.
• Infrastructure Automation:
  Proficiency with Terraform, Cloud Formation, 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, Power Shell or similar, for automation and tooling.
• Networking & Storage:
  Strong understanding of VPC architecture, subnets, firewalls, load balancers, and storage tiers.
• Dev Ops & CI/CD:
  Experience building pipelines with Jenkins, Git Lab CI/CD, Git Hub Actions or Azure Dev Ops.
• Security & Compliance:
  Implement and monitor IAM, encryption, audit logging, network isolation, and compliance frameworks.
• Monitoring & Optimization Tools:
  Familiarity with Cloud Watch, 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.

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.