Senior Infrastructure Engineer – Essex Based Council Temporary, Part-Time 3 days per week 2-3 Months Contract Initially £500 Umbrella daily rate Immediate Start Closing Date: Monday 8th December 2025 Interviews: Thursday 11th December 2025 Due to the nature of this role, the successful candidate will be required to be on-site 2 days per week. Key Accountabilities: * Technical support and maintenance for enterprise level server infrastructure including Windows Server, Active Directory, DNS, DHCP. * Manage, troubleshoot and optimise network architecture, including LAN/WAN, WIFI, firewalls, VPNs, and routing for secure connectivity. * Technical support and knowledge of Backup solutions and Disaster Recovery * Monitor system performance and capacity, proactively identifying and resolving issues * Ensure robust cybersecurity measures, including vulnerability management, patching, and compliance * Technical lead for infrastructure projects, migrations, and upgrades * Administer and manage Microsoft 365/Office 365 environments, including Exchange Online, SharePoint, Teams, Co-Pilot, Intune, and security/compliance configurations. * Maintain documentation and enforcement of IT policies * Local government experience * Provide technical mentorship and guidance to junior engineers and support teams