Senior Engineer Infrastructure Operations Linux

We're supporting a high-profile government-aligned organisation delivering secure, mission-critical infrastructure services. They are looking for an experienced Senior Infrastructure Engineer (Linux SME) to join their specialist infrastructure team., As a Linux Subject Matter Expert, you will:

• Provide expert-level support across enterprise Linux platforms
• Maintain and enhance secure, assured infrastructure environments
• Support both BAU operations and project-based deliverables
• Lead conversations around infrastructure automation and environment growth
• Build and maintain development environments
• Containerise applications and services
• Support modern deployment approaches alongside traditional platform operations
• Work closely with cross-functional infrastructure specialists
• Produce and maintain high-quality operational documentation
• Contribute to knowledge transfer across the team

You'll be operating within structured service management and security frameworks, so experience in highly regulated environments is essential.

• Strong Linux system administration (enterprise level)
• Experience supporting secure production platforms
• Containerisation experience (e.g. Docker or similar)
• Building and maintaining development environments
• Automation and infrastructure improvement initiatives
• Working within formal IT service management frameworks
• Strong troubleshooting and performance optimisation skills

Desirable Certifications

One or more of the following:

• RHCSA (Red Hat Certified System Administrator)
• RHCE (Red Hat Certified Engineer)
• LFCS (Linux Foundation Certified System Administrator)
• LPIC-1 or LPIC-2

Security & Eligibility

Due to the nature of the work:

• You must be a British national (single or dual nationality)
• You must have resided in the UK for at least 2 of the last 5 years
• You must be eligible to obtain SC (Security Clearance)

Clearance does not need to be held currently, but you must be able to pass vetting (6-8 week process).

• Hybrid role - minimum 60% onsite at Hanslope Park (Milton Keynes)

• Occasional travel within London/Milton Keynes area

• Standard professional working week (37.5+ hours)

• On-call rota participation required

• Minimum 6 shifts per 28-day cycle

• Flat fee paid per shift

This is an opportunity to work within a highly secure, nationally significant environment where infrastructure resilience and security truly matter.