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Site Reliability Engineers
Senior Site Reliability Engineer
Space, Defence and Intelligence – CGI
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:
- Competitive salary
- Excellent pension
- Private healthcare
- A share scheme (3.5% vesting + 3.5% matching), making you a Partner—not just an employee
- Dedicated training and development programs to future-proof your career
We are committed to inclusivity, fostering a diverse tech community, and supporting our armed forces veterans. Our Gold Award status for Armed Forces Corporate Covenant obligations reflects our AAA advocacy.
Join a collaborative, innovation-driven culture where self-starters thrive. Although we idealtrain in designing customised operations and maintenance solutions for mission-critical government IT systems.
About the Role
CGI’s Space, Defence and Intelligence unit delivers highly-specialised technical solutions for government security sectors, addressing complex challenges via bespoke, secure systems. This cross-functional role will see you:
- Partner with clients to define, drive, and validate integrated solutions
- Collaborate across teams to engineer robust site reliability processes
- Continuously optimise system resilience and align outcomes with strict operational SLAs
The business offers exceptional exposure to cutting-edge technologies with career-long development—and a workspace where Ownership, Collaboration and Innovation drive progress.
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Key Responsibilities
Essential
- Shine in automation and observability, e.g.:
- Deploying CI/CD pipelines, alerting systems, and user guides
- Automating operational tasks (scripts, infrastructure as code)
- Excel as a troubleshooter and UX advocate:
- Metrics-driven incident resolution and SLA compliance
- Rooting out performance bottlenecks
- Self-grow continuously:
- Experiment with new technologies
- Teach peers through documentation, mentorship or tooling
Highly Desirable
- Working experience with AWS
- Leverage Linux/Windows sysadmin skills for secure ops at scale
- Containerisation (Docker, K8s) for scalable infrastructure
- Security protocols (e.g. PKI, TLS) for hardening environments
Who You Are
Technical Fit
Required
- Deep experience in Software Engineering (Java/Python expertise is reseted)
- CI/CD piloting from principles through to deployment
- Closing the loop on incidents and performance with SLA alignment
- Inveterate documentation (from config guides to user manuals)
- Fast learner and com raccolkiego media, enthusiasatically collaborator-driven culture.
Optional
- Have a continuous desire to lead on the tech curve
- Contribute beyond your specialty, demonstrating technical versatility
About Security Clearance
To ensure smooth transition, CGI requires most employees to hold or be eligible for:
- A High Degree of UK Security Clearance
- Lori normally relates to candidates who:
- Are sole British nationals
- Have been UK resident for 10+ years
- Spent <28 days total outside the UK in the last 5 years
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If you don’t currently hold clearance, we encourage you to apply anyway! We match the right candidates to roles across CGI based on suitability.
Work Arrangements
This role operates primarily from a secure client site, with on-site attendance required 5 days/week due to compliance needs.
- Business-as-usual constraints generally require site presence, though limited flexibility may be accommodated. All arrangements are agreed in advance with project teams.
Why Join Our Team
We’re a global IT and consultancy giant evolving with bold self-organised renovation. Here’s how you’ll thrive:
- Own your impact: Quickly take responsibility for shaping successful projects.
- Global movement: Borrow from 60+ offices to amplify any collaboration or innovation.
- Your leadership: Launched today, retain driver importance all career long.
Explore your potential with us. Because on CGI, we shape long-term careers—not just jobs.
Bonus Readings ✅ Cultural value: CGI’s Public Covenant → Freedom to sucede armed forces members into technologies roles. 🌏 Geographies: We elevate hiring for tech migrations, and tons e.g. distributed teams across regions.
CGI – Turn meaningful insights into action.
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