Senior/Principle Security Infrastructure Engineer
Permanent | £70,000 to £90,000 | Bristol (hybrid)
Our client is seeking a Senior/Principle Security Infrastructure Engineer to provide technical leadership and hands-on expertise in securing enterprise infrastructure and networks. This role focuses on resilience, compliance, and integrity across a complex multi-technology environment.
Key Responsibilities
* Design, build and maintain secure on-premises and cloud network and system architectures
* Harden Microsoft Server/Desktop platforms, Active Directory, and Group Policies
* Deploy and manage MFA solutions (YubiKey, RSA) for enterprise identity and access protection
* Secure virtualisation platforms (Hyper-V, VMware) and implement endpoint security (EDR, anti-malware, DLP)
* Operate and optimise SIEM tools (Splunk, Microsoft Sentinel) for threat detection and incident response
* Perform vulnerability assessments using Qualys and Tenable, driving remediation and continuous improvement
* Align security controls with ISO 27001, NIST, CIS, and Cyber Essentials, supporting audits and compliance
Skills & Experience
1. Proven experience in infrastructure or network security within enterprise environments
2. Strong knowledge of Mic...