Salary: £60,000 - 70,000 per year Requirements: We are looking for a Senior Security Engineer with experience in infrastructure, security, systems, or application engineering. We are looking for someone eligible for DV clearance. We would like experience across several of the following areas: VMware vSphere, Windows Server, Red Hat Enterprise Linux, Active Directory, DNS, Group Policy, and Remote Desktop Services. We are interested in candidates with security experience in Trellix or McAfee technologies, SIEM platforms, syslog reporting and integration, antivirus technologies, TLS certificates, PKI concepts, and secure gateway technologies. We value Linux administration, shell scripting, regular expressions, and firewall configuration and management. We would like experience with LDAP directory services, LDIF, email protocols and standards, and chat and messaging technologies, with XMPP desirable. We are also interested in experience with XML, JSON schema, file format validation and analysis, and web protocols. We are looking for someone comfortable producing technical designs and documentation. We would like candidates who can work across the full lifecycle of solutions and are interested in developing further into architecture. A background in a highly secure and business-critical environment would be an advantage. Responsibilities: We support the design, implementation, and ongoing enhancement of secure gateway solutions. We produce technical designs and documentation for customer-driven change requests. We work closely with Solution Architects, Engineering Leads, and operational support teams. We support service availability, resilience, and security improvements. We troubleshoot complex infrastructure and application issues. We assist SOC and 3rd line teams with incident investigation and resolution. We manage and maintain directory services, messaging systems, and gateway technologies. We create scripts and automation to improve operational efficiency. We support the full change lifecycle from design through deployment and support. We contribute to a collaborative team delivering secure gateway technologies and associated infrastructure services. Technologies: Active Directory Firewall Support JSON LDAP Linux Security VMware Web Windows XML RHEL More: We are recruiting for a Senior Security Engineer to join a specialist cyber security programme supporting a highly secure and business-critical environment. This is an onsite role based in Bracknell and the South, and it offers a salary of £60-70k per annum plus a benefits package. The role sits within a collaborative team of architects, engineers, and support specialists, and it is ideal for someone looking to build further into architecture while working hands-on across secure gateway technologies and associated infrastructure services. last updated 22 week of 2026