Infrastructure Test Engineer - Secure Cloud Infrastructure; SC Clearance

Position Description

At CGI, our Space, Defence and Intelligence business unit delivers mission‑critical systems that help keep the UK safe and secure.

As an Infrastructure Test Engineer, you will play a vital role in assuring the performance, resilience, and security of complex infrastructure platforms across cloud and on‑premise environments. Working on high‑impact programmes, you will help deliver quality‑driven outcomes through rigorous testing and automation. You’ll take ownership of validation processes, contribute innovative approaches to testing, and collaborate with expert teams in an environment that supports continuous development and meaningful impact.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ‘Best Employer’ by the Financial Times. 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.

Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This position will be based on site near Gloucester 5 days a week.

In this role, you will design and execute comprehensive testing strategies to validate infrastructure platforms, ensuring performance, reliability, and security across complex environments. You will take ownership of infrastructure testing activities, from developing automated test scripts to validating infrastructure‑as‑code deployments, supporting high‑quality releases into production.

You will work closely with Dev Ops, SRE, and engineering teams to integrate testing into CI/CD pipelines, enabling continuous delivery and rapid feedback. Within a collaborative and supportive environment, you will contribute creative solutions to improve testing coverage, enhance automation, and ensure infrastructure solutions meet the highest standards.

• Design & Execute infrastructure test plans across cloud and on‑prem environments
• Automate & Maintain test scripts using tools such as Python, Bash, Terraform, or Ansible
• Integrate & Support testing within CI/CD pipelines (e.g., Jenkins, Git Lab CI, Azure Dev Ops)
• Validate & Assure infrastructure-as-code deployments and configuration changes
• Monitor & Analyse system performance using tools like Prometheus, Grafana, ELK
• Collaborate & Align with Dev Ops, SRE, and engineering teams
• Document & Improve test cases, results, and quality processes

You should have strong experience in infrastructure testing or engineering, with a solid understanding of enterprise infrastructure components and modern Dev Ops practices. You will bring a proactive approach to quality assurance, along with the ability to work collaboratively across technical teams in complex environments.

• Experience in infrastructure testing, QA, or engineering roles
• Strong understanding of infrastructure (compute, storage, networking, virtualization)
• Proficiency in Linux/Unix environments and scripting (e.g., Bash, Python)
• Experience with automation tools (Terraform, Ansible, Puppet)
• Familiarity with cloud platforms (AWS, Azure, GCP) and hybrid environments
• Exposure to containers (Docker, Kubernetes)
• Knowledge of networking and security best practices