Site Reliability Engineers (DV Security Clearance)

Position Description:

CGI was recognised in the Sunday Times Best Places to Work List 2025 and named one of the Worlds 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.

CGIs Space Defence and Intelligence business unit delivers innovative mission-critical solutions to some of the UK governments 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.

Your future duties and responsibilities:

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.

You will work with a modern and diverse technology stack including:

Languages & Scripting: Java Python Go JavaScript (TypeScript) Bash

Frontend: Vue

CI/CD & Automation: Jenkins GitLab CI Ansible Cucumber

Cloud & Platforms: AWS OpenShift Linux

Infrastructure as Code: Terraform

Data & Streaming: Apache NiFi

Monitoring & Logging: Grafana ELK Stack SonarQube

Version Control: GitLab
Automation & Infrastructure as Code (IaC)
Automate infrastructure provisioning configuration and CI/CD pipelines using Terraform Ansible CloudFormation and scripting languages.

CI/CD & Platform Engineering
Build maintain and improve CI/CD pipelines using Jenkins GitLab CI/CD and related tooling.

Monitoring reliability & optimisation
Implement and manage monitoring logging alerting and performance optimisation using tools such as Grafana ELK Stack CloudWatch Prometheus and SonarQube.

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

Disaster recovery & resilience
Design and test backup disaster recovery and self-healing strategies to ensure system reliability and availability.

Collaboration & documentation
Work closely with development DevOps security and operations teams; produce runbooks architecture documentation and knowledge-sharing materials.

Required qualifications to be successful in this role:

Proven experience as a Site Reliability Engineer DevOps 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 GitLab CI/CD etc.)

Strong knowledge of Infrastructure as Code (Terraform CloudFormation Ansible)

Solid understanding of AWS and cloud-native architectures

Experience with Linux-based environments and production troubleshooting

Familiarity with containerisation and orchestration (OpenShift 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

Skills:

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

What you can expect from us:

Together as owners lets turn meaningful insights into action.

Life at CGI is rooted in ownership teamwork respect and belonging. Here youll 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. Thats why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our companys strategy and direction.

Your work creates value. Youll 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.

Youll shape your career by joining a company built to grow and last. Youll 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 teamone of the largest IT and business consulting services firms in the world.