Salary: £28,900 - 31,200 per year Requirements: Infrastructure access control including Ubuntu and/or Linux system administration LDAP design and management RADIUS / TACACS configuration Significant experience in security engineering for installation, configuration, maintenance, administration, and support of related solutions Experience in administration of PKI hierarchy Familiarity with security policy frameworks like NIST CSF and ISO 27001 Experience with MoD Secure by Design concepts Knowledge of virtualization technologies (VMware ESXi 8, VCentre 8) Understanding of network infrastructure including CISCO IOS-XE, CISCO ASA, BGP, VRF/MPLS, VPN, QoS Clear understanding of JSP 604/453 network security compliance Relevant cyber security qualifications (e.g., CompTIA Security, GIAC Security Essentials) Strong critical thinking and analytical skills Ability to work under pressure and within complex organizations Experience in delivering accredited secure solutions in the public sector Experience in Agile (SAFE4) and Waterfall projects In-date professional registration with APMG or CIISec is desirable Candidates must hold a DV clearance or current SC and be willing to undergo security vetting Responsibilities: Support the Security team in installing, configuring, and updating servers and software components Validate engineering designs for JSP 453 compliance and provide supporting documentation Work collaboratively with Engineering, Design, and Security teams to identify security risks and recommend mitigations Advise on benefits of emerging cyber security technologies, presenting recommendations and conducting cost/risk analyses Conduct product selections against complex requirements, focusing on performance, cost, and time Contribute security engineering insights for the implementation of various technologies Ensure compliance with security policies and frameworks relevant to the organization Engage in high-pressure project timelines and deliver results Assist in writing and analyzing technical requirements Collaborate as part of a large technical team to enhance security measures Technologies: Cisco Support JSP LDAP Linux MPLS Network Security Ubuntu VPN VMware iOS PHP Python More: We are a dynamic organization located in Corsham, offering hybrid working arrangements. Our team is dedicated to enhancing security infrastructure across the public sector, particularly within Defence Digital. We prioritize delivering accredited secure solutions and fostering an innovative work environment. We are looking for a Security Infrastructure Engineer to join our passionate team, where you will play a critical role in managing and mitigating security risks while enjoying the benefits of professional development and collaborative teamwork. last updated 4 week of 2026