IT System Administrator
5 days ago
Gloucester
Senior IT Systems Administrator Location: Gloucestershire, UK (On-Site) Employment Type: Full-time, Mid-Senior level About the Opportunity Sanderson is collaborating with a leading global technology organisation that delivers mission-critical services in secure environments for government and national security clients. The team is expanding and seeking a skilled Senior IT Systems Administrator to join a high-performance environment supporting critical infrastructure operations. In this role, you’ll work across multiple teams to ensure stability, performance, and compliance across enterprise systems — maintaining secure IT environments and helping drive continual service improvement through innovation and best practice. Key Responsibilities • Provide 1st and 2nd line technical support across complex IT environments, • Monitor system performance to ensure uptime, reliability, and efficiency, • Develop, maintain, and update system documentation, • Implement and enforce operational standards, policies, and procedures, • Support compliance initiatives and internal process improvements Essential Skills & Experience • Strong background in Windows Server Administration (2016/2019), • Experience working to ITIL best practices, • Excellent organisational and time management skills, • Analytical mindset with a proactive approach to identifying risks and improvements, • Strong communication and collaboration skills, with a willingness to share and learn Desirable Technologies & Experience • Installation, upgrade, configuration, and support experience with Windows Server, AWS, and Azure, • Strong understanding of Active Directory (object creation, OU management, RBAC, DFS), • Knowledge of virtualisation technologies: VMware, vSphere, vSAN, SCVMM, Hyper-V, • Familiarity with containerisation tools and technologies, • Networking fundamentals: TCP/IP, DHCP, DNS, LAN/WAN, • Scripting experience in PowerShell, • Awareness of McAfee EPO/ENS security tools Security Clearance Requirements Due to the nature of the work, candidates must be eligible for national security clearance. To meet this requirement, applicants must: • Be sole British citizens (dual nationality is not permitted), • Have not spent more than 30 consecutive days outside the UK in the past 10 years, • Have no criminal record, • Have no significant financial irregularities (e.g. bankruptcy, unpaid debt) Unfortunately, candidates who do not meet these criteria cannot be considered for this position. Why You’ll Enjoy Working Here • Competitive salary and comprehensive benefits package, • Hybrid working model balancing flexibility and collaboration, • Career growth opportunities through continuous learning and development, • Work on high-impact, nationally significant projects, • Inclusive, people-first culture focused on wellbeing and professional excellence