Site Reliability Engineers (DV Security Clearance)

CGI Group Inc.; Bagstone; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Competitive salary

Excellent pension

Private healthcare

Share scheme

Job summary

CGI is seeking experienced Site Reliability Engineers to join cross-functional teams supporting secure, cloud-based and big-data platforms in the UK. You will help design, build, operate, and continuously improve highly reliable, scalable systems within a secure environment and work onsite.

Role requires UK nationals with DV/HLC clearance. You will work with a modern stack (AWS, OpenShift, Terraform, Ansible, Jenkins, GitLab CI/CD, Kubernetes) and collaborate with delivery teams to ensure

Qualifications

• Proven experience as a Site Reliability Engineer or DevOps in secure, cloud-based environments.

Responsibilities

• Architect, build and operate cloud infrastructure.
• Design secure, scalable, fault-tolerant infrastructure across AWS.
• Support and operate live systems.
• Maintenance of deployment environments and changes to live services.
• Collaborate with teams; produce runbooks and architecture docs.
• Automate provisioning with Terraform, Ansible, CloudFormation, and scripting languages.
• Build, maintain, and improve CI/CD pipelines with Jenkins, GitLab CI/CD, and related tooling.
• Monitor, log, alert, and optimise using Grafana, ELK Stack, Prometheus, and SonarQube.
• Ensure IAM, encryption, network controls, and secure configurations per standards.

Skills

Python

Bash

Go

Java

JavaScript

TypeScript

Terraform

Ansible

CI/CD

Tools

Jenkins

GitLab CI/CD

OpenShift

Kubernetes

Terraform

Ansible

CloudFormation

Terraform

Grafana

ELK Stack

Prometheus

SonarQube

Job description

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 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.
• 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.

Technical requirements

• 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

Life at CGI

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

Additional Information

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.