Senior Linux System Administrator

Salary: £100,000 - 100,000 per year

Requirements:

• Strong Linux administration experience with RHEL, Rocky Linux or similar
• VMware vSphere/ESXi administration experience
• Experience with Ansible or equivalent infrastructure automation tools
• Strong Bash/shell scripting skills
• Strong troubleshooting skills across Linux environments, including networking, storage and permissions
• Experience with CI/CD environments and methodologies
• IT infrastructure and security experience
• Active and valid Developed Vetting (DV) security clearance
• UK resident status
• Experience supporting large-scale or complex infrastructure environments is desirable
• Experience working within DevOps environments is desirable
• Windows Server knowledge is desirable
• Experience supporting secure or highly regulated environments is desirable
• Exposure to big data, cybersecurity or data science platforms is desirable

Responsibilities:

• Administer, maintain and optimise Linux server environments across production and development platforms
• Manage VMware vSphere/ESXi infrastructure, including virtual machines, resource allocation and host configuration
• Develop and maintain automation using Ansible or equivalent tools to streamline deployments, configuration and routine tasks
• Develop and maintain Bash and shell scripts
• Troubleshoot complex Linux, networking, storage, permissions and performance issues
• Support secure IT infrastructure and CI/CD environments
• Support interoperability with Windows Server environments where required
• Contribute to continuous improvements across a highly secure big data platform

Technologies:

• Ansible
• Big Data
• Bash
• CI/CD
• DevOps
• Support
• Linux
• RHEL
• Security
• VMware
• Windows

More:

We are offering an opportunity for a DV Cleared Senior Linux System Administrator to join our specialist security team supporting a secure, large-scale big data platform for a UK critical national infrastructure programme. Our platform supports a suite of cutting-edge cybersecurity and data science tools, and our team uses DevOps methodologies to deliver continuous improvements in response to evolving security requirements. We offer a bonus of up to 10%, a £5,000 annual DV allowance while working in a role requiring DV clearance, a pension scheme with 5% employee and 10% employer contribution, private GP access for you and your immediate family, enhanced maternity, paternity and adoption leave, paid carers leave, a holiday purchase scheme, and optional healthcare, dental and gym benefits. The role is predominantly on-site, with no fully remote or hybrid option, and no visa sponsorship is available.

last updated 38 week of 2026