Salary: £34,000 - 56,000 per year Requirements: Extensive background as an infrastructure engineer Proven skills in coding Experience with infrastructure hardening, maintenance, and engineering Working knowledge of Microsoft and Linux/Unix Familiarity with virtualization technologies (e.g., VMWare) Experience with endpoint security products (e.g., Symantec, Trellix) Understanding of network security and firewalls Proficiency in vulnerability scanning and analysis Ability to review code for potential security issues Desirable experience in delivery and proposal environments Proven track record as a 3rd line infrastructure engineer Solid experience in developing and automating processes Working knowledge of SecDevOps tools and methodologies Excellent analytical, problem-solving, and communication skills Hands-on experience with SIEM solutions (e.g., Splunk, ArcSight, LogRhythm) Capability to communicate effectively with leadership and present in security working groups Good commercial awareness and project discipline Must be British or non-dual national with DV clearance or willing to obtain it Responsibilities: Support the update process for Commercial Off-The-Shelf (COTS) applications Conduct regular assessments to identify vulnerabilities Manage and update security definitions across our platforms Analyze vulnerability assessment reports and implement changes Perform thorough daily checks of security components Conduct daily system health checks for optimal server functioning Monitor and report on local system capacity, suggesting improvements Support application patching to enhance system performance Oversee log archiving and deletion processes Update local admin account passwords and manage account policies Implement and manage resource and system monitoring tools Ensure local server backups are conducted regularly Review and update engineering and design documents periodically Schedule and execute server and application reboots as preventive maintenance Perform full audits for interoperability and patch compliance Oversee daily checks of Public Key Infrastructure and manage lifecycle of secrets Execute comprehensive vulnerability scanning and lead analysis of findings Review code for potential security issues prior to production releases Technologies: Support Linux Network Security Splunk Unix VMware AI Java Machine Learning PowerShell More: At Leidos, we deliver innovative solutions and empower our diverse teams to achieve customer success. Located in Farnborough, UK, we are dedicated to sustainability and community contributions. We offer a rewarding employment package including a contributory pension scheme, private medical insurance, 33 days of annual leave, and flexible benefits. Our culture fosters a sense of belonging and commitment to diversity, ensuring equal access to opportunities. Join us in addressing complex challenges in national security, defense, and more, while nurturing a healthy work-life balance. last updated 8 week of 2026