Linux Engineer

CBSbutler Holdings Limited trading as CBSbutler; East Hampshire; On-site; GBP 101,000 - 120,000; Full time

Job summary

CBSbutler Holdings Limited (trading as CBSbutler) is seeking an experienced Linux Engineer with active DV clearance for a fully on-site role in Hampshire. The candidate will manage enterprise Linux platforms within a secure MOD environment, focusing on security, resilience and performance.

Responsibilities include installation, patching, troubleshooting, upgrades, and collaboration with cross-functional teams to maintain compliant, high-availability systems. DV clearance is mandatory.

Qualifications

• DV clearance is essential.
• MOD/Defence sector experience required.
• Strong hands-on Linux administration experience.

Responsibilities

• Administering and supporting enterprise Linux environments.
• Installing, configuring, patching, and maintaining Linux servers.
• Troubleshooting complex infrastructure and OS issues.
• Supporting upgrades, migrations, and platform improvements.
• Collaborating with infrastructure, network, security, and project teams.
• Monitoring system health, performance and availability.
• Producing and maintaining technical documentation and procedures.
• Ensuring compliance with security policies.

Skills

Linux administration

DV clearance

MOD/Defence experience

Security

Tools

Red Hat

Rocky Linux

Ubuntu

Virtualization

Job description

Linux Engineer - DV cleared

+12 months +

+On site in Hampshire

+Outside IR35

+£550 - £650 a day

+DV cleared role - current active clearance is essential

+Sole British national only - due to the nature of the project

We're looking for an experienced DV Cleared Linux Engineer to join a high-profile Defence programme supporting critical secure infrastructure within an MOD environment.

This is a fully on-site role based in Hampshire, offering the opportunity to work on business-critical systems where security, resilience, and performance are paramount. You'll become part of an experienced technical team responsible for maintaining, supporting, and enhancing Linux-based platforms across a highly secure environment.

As a Linux Engineer, you'll be responsible for the administration, maintenance, and optimisation of enterprise Linux environments, ensuring systems remain secure, available, and operating at peak performance.

Key responsibilities include:

• Administering and supporting enterprise Linux environments.
• Installing, configuring, patching, and maintaining Linux servers.
• Troubleshooting complex infrastructure and operating system issues.
• Supporting system upgrades, migrations, and platform improvements.
• Working closely with infrastructure, network, security, and project teams.
• Monitoring system health, performance, and availability.
• Producing and maintaining technical documentation and operational procedures.
• Ensuring compliance with MOD security policies and operational standards.

Essential Experience

• Current DV (Developed Vetting) clearance.
• Previous MOD or Defence sector experience is essential.
• Strong hands‑on experience administering Linux operating systems (Red Hat Enterprise Linux, Rocky Linux, Oracle Linux, Ubuntu, or similar).
• Experience with Linux system installation, configuration, patching, and troubleshooting.
• Good understanding of enterprise infrastructure, including storage, virtualisation, networking, and server technologies.
• Experience working within highly secure or mission‑critical environments.