Senior Linux System Administrator

Senior Linux System Administrator – DV Security Clearance (London or Reading) Title: Senior Linux System Administrator Client: Leading UK Telecommunications Organisation Employment: Permanent Location: Reading Salary: £70,000–£100,000, plus a £5,000 DV allowance and a bonus of up to 10% Working pattern: Onsite, with the option to work from home every other Friday Hours: 37.5 hours per week Applicants must hold active and valid Developed Vetting (DV) security clearance to be considered for this opportunity. Unfortunately, applications from candidates without current DV clearance cannot be progressed. An opportunity is available for a DV Cleared Senior Linux System Administrator to join a specialist security team supporting a secure, large-scale big data platform for a UK critical national infrastructure programme. The platform supports a suite of cutting-edge cybersecurity and data science tools, with the team using DevOps methodologies to deliver continuous improvements in response to evolving security requirements. Key Responsibilities Administer, maintain and optimise Linux server environments across production and development platformsManage VMware vSphere/ESXi infrastructure, including virtual machines, resource allocation and host configurationDevelop and maintain automation using Ansible or equivalent tools to streamline deployments, configuration and routine tasksDevelop and maintain Bash and shell scriptsTroubleshoot complex Linux, networking, storage, permissions and performance issuesSupport secure IT infrastructure and CI/CD environmentsSupport interoperability with Windows Server environments where requiredContribute to continuous improvements across a highly secure big data platformEssential Skills Strong Linux administration experience with RHEL, Rocky Linux or similarVMware vSphere/ESXi administrationAnsible or equivalent infrastructure automation toolsBash/shell scriptingStrong troubleshooting skills across Linux environmentsNetworking, storage and permissionsCI/CD environments and methodologiesIT infrastructure and security experienceDesirable Skills Experience supporting large-scale or complex infrastructure environmentsExperience working within DevOps environmentsWindows Server knowledgeExperience supporting secure or highly regulated environmentsExposure to big data, cybersecurity or data science platformsBenefits Bonus of up to 10%£5,000 annual DV allowance while working in a role requiring DV clearancePension scheme with 5% employee and 10% employer contributionPrivate GP access for you and your immediate familyEnhanced maternity, paternity and adoption leavePaid carers leaveHoliday purchase schemeOptional healthcare, dental and gym benefitsImportant Information Applicants must hold active and valid DV clearanceApplicants must be UK residentsNo visa sponsorship is available for this roleThis role is predominantly on-site, with no fully remote or hybrid option