Site Reliability Engineer; SRE - Defence

Site Reliability Engineer (SRE) - Defence / National Security - 75k - Farnborough - Hybrid

A permanent opportunity for an experienced Site Reliability Engineer who enjoys building secure, automated, and highly reliable platforms. This role sits within a defence and national security environment, working on modern infrastructure where automation, resilience, and secure-by-design principles are fundamental.

You'll work closely with platform engineers, infrastructure teams, and operational stakeholders to take requirements from early design and proof-of-concept through to production. The role blends hands-on engineering with technical design, offering real influence over tooling, standards, and Dev Ops ways of working. It suits someone curious, detail-oriented, and comfortable working in complex, regulated environments.

What you'll be doing

• Designing, delivering, upgrading, and maintaining core platforms, services, and automations
• Building and improving monitoring, alerting, and observability platforms
• Designing secure infrastructure using automation-first approaches
• Creating and product ionising proofs of concept for new tools and technologies
• Diagnosing and resolving performance, reliability, and availability issues
• Supporting architecture, documentation, and non-functional requirements
• Mentoring engineers and helping improve Dev Ops and SRE practices

Essential experience

• Strong experience with Linux (Ubuntu) and Windows Server environments
• Hands-on scripting skills (Bash, Python, Power Shell or similar)
• Proven experience with automation and Dev Ops tooling (Ansible, Terraform, CI/CD, Git)
• Experience working with Azure or similar cloud platforms
• Solid understanding of infrastructure reliability, monitoring, and incident response
• Strong problem-solving skills and ability to work across multiple priorities
• Willingness to work in secure, regulated environments (SC eligibility required)

Desirable experience

• Infrastructure-as-Code lifecycle and best practices
• Containerisation and orchestration (Docker, Kubernetes)
• Configuration management and desired state tooling
• Application and platform monitoring tools (Splunk, Nagios or similar)
• Experience hardening systems and conducting security assessments
• Understanding of Agile and Dev Ops principles in practice

A collaborative, inclusive culture with strong benefits including competitive pay, bonus, pension, private healthcare, generous leave, professional development, wellbeing perks, and modern on-site facilities.