Senior Systems Administrator

• Administer and maintain enterprise IT systems and third-party devices, following best-practice lifecycle management
• Perform advanced system monitoring to ensure availability, performance, and integrity
• Embed operational best practice across systems, processes, and teams
• Maintain IT asset data with automated monitoring and reporting
• Enforce cybersecurity standards and carry out vulnerability management
• Ensure compliance with security, Information Governance, and NHS frameworks
• Manage security tooling, patching, and hardening activities
• Support BIA, BCP, and recovery practices
• Support and manage cloud environments in collaboration with suppliers
• Administer Microsoft 365 services including Teams and SharePoint Online
• Manage Identity & Access Management using Microsoft Entra ID (MFA, Conditional Access, user provisioning)
• Contribute to system maturity and continuous improvement frameworks
• Provide support across WiFi, firewalls, VPNs, and core networking services
• Apply strong knowledge of DNS, DHCP, TCP/IP, switches, and routers
• Monitor and optimise system performance for high availability
• Act as escalation point for complex 2nd/3rd line incidents
• Provide expert support for business-critical systems (e.g. CAFM and estates platforms)
• Diagnose and resolve infrastructure, application, and network issues in line with SLAs
• Work closely with external vendors and service providers
• Maintain configuration management, technical documentation, and operational processes
• Ensure secure storage, backup, and recoverability of systems and data

Technologies:

• Active Directory
• Azure
• CAFM
• Cloud
• Support
• ITIL
• Microsoft 365
• Network
• SQL
• Security
• SharePoint
• TCP/IP
• Windows
• Office 365, We are a large NHS organisation based in Cambridge, looking to recruit an experienced Senior Systems Administrator for a 6-month contract engagement. This role operates at the intersection of Information Technology (IT) and Operational Technology (OT), supporting critical systems across estates and facilities teams in a highly regulated healthcare environment. We offer competitive rates and the opportunity to work in a hybrid/onsite capacity, contributing to the reliability and security of our enterprise infrastructure and systems.

• Proven experience as a Senior Systems Administrator / Infrastructure Engineer in large enterprise environments
• Strong Windows Server, Active Directory, and Microsoft SQL experience
• Experience supporting Microsoft 365, Azure, and hybrid environments
• Solid understanding of cybersecurity, patching, and compliance frameworks
• Strong networking fundamentals (DNS, DHCP, VPNs, firewalls)
• Excellent documentation, troubleshooting, and stakeholder engagement skills
• ITIL, PRINCE2, or similar service/project management certification (desirable)
• Experience working in the NHS, public sector, or highly regulated environments (desirable)
• Experience supporting estates, facilities, or OT-adjacent systems (desirable)
• Experience mentoring or guiding junior engineers (desirable)