Senior Infrastructure Engineer (Security Clearance)

Position Description

At CGI, we're shaping the future of national security and defence through innovative, mission-critical IT systems that keep the UK safe. As part of our Space, Defence and Intelligence business unit, you'll play a vital role in delivering secure, resilient infrastructure solutions that power some of the UK's most advanced programmes. Working on site five days a week in Chippenham, you'll collaborate closely with experts across CGI, our clients, and partners to design, support and optimise systems that drive real-world impact. This is your opportunity to contribute to meaningful, high-value work while being part of a supportive and forward-thinking environment where your ideas and ownership truly matter.

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. 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. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go.

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 is a full-time, on-site position based near Chippenham.

Your future duties and responsibilities

In this role, you will ensure the resilience, reliability, and performance of complex infrastructure environments that underpin critical defence operations. You'll provide hands-on technical support, proactive maintenance, and innovative solutions across a broad range of technologies, contributing directly to system integrity and mission success. Working closely with senior engineers, you'll play a key role in enhancing infrastructure capabilities, developing your expertise, and helping CGI deliver excellence in every engagement.

Key Responsibilities Include

• Support & Maintain: Deliver technical support for VMware, Tanzu, Dell VxRail, and Dell Data Domain platforms.
• Troubleshoot & Secure: Diagnose issues across key management and access systems such as HashiCorp Vault, Thales HSM, and BeyondTrust.
• Administer & Optimise: Manage Windows Server 2022, Hyper-V environments, and system performance monitoring.
• Collaborate & Document: Work with cross-functional teams to enhance infrastructure and maintain comprehensive documentation.
• Respond & Resolve: Participate in an on-call rota to ensure business-critical systems remain operational 24/7.
  
  

Required Qualifications To Be Successful In This Role

To succeed in this role, you'll bring hands-on experience in infrastructure or support engineering, ideally within defence or other highly regulated environments. You'll have a collaborative mindset, strong problem-solving ability, and a proactive approach to maintaining and improving secure systems.

You Should Have

• Proven experience in infrastructure or support engineering.
• Experience working in Defence or other secure, regulated environments.
• Familiarity with VMware, Microsoft, or Security technologies (certifications desirable).
• Knowledge of Hyper-converged Infrastructure and network principles.
• Strong communication and teamwork skills.
  
  

Desirable

• Knowledge of cross-domain technologies (e.g., Tiger Traps, Garrison, OpsWat, NiFi).
• Exposure to DevOps tools such as GitLab, Harbor, FluxCD, and Kubernetes.
• Familiarity with Elastic for monitoring and analytics.
  
  

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 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.

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.