London, UK

About The Opportunity

The System Administration team is responsible for maintaining, upgrading, and managing our clients infrastructure, including office networks, data centre services, core platform tooling, and endpoint management. At the heart of this role is a commitment to ensuring stable, secure, and reliable IT operations for over 200 employees. 

This role is primarily infrastructure-focused, covering networking, server estate ownership, patching, backups, monitoring, and Microsoft 365 / Intune administration. A key part of the position is contributing to building stronger infrastructure standards and best-practice frameworks as our processes and tooling continue to mature. Success in this role requires proactiveness, strong problem-solving skills, clear communication, and the ability to work effectively in a fast-paced environment where priorities can shift and processes may be evolving. The ideal candidate is solution-focused, adaptable, and confident working across a broad range of technologies.

Responsibilities

  • Onsite in the London office 3 days per week (rota with other team members) 
  • Occasional travel to the Belfast office (ad hoc support if required) 
  • Manage and support office networks (LAN/Wi-Fi): connectivity, stability, performance, design and build. 
  • Firewall ownership: rules, NAT, segmentation, VPNs, firmware and operational support 
  • Switching and core network services: VLANs, routing, uplinks, redundancy and troubleshooting 
  • Network architecture & operations: standards, addressing strategy, DNS/DHCP, capacity planning. 
  • Support and maintain on-prem / data centre server estate (hardware, OS, lifecycle, break-fix, upgrades) 
  • Data centre support: travel onsite (Central London) to install, manage and upgrade infrastructure; carry out BAU monitoring and remediation, with flexibility to support occasional out-of-hours maintenance or urgent fixes when required. 
  • Server and infrastructure patching: execution, reporting and compliance adherence 
  • MS 365 and Intune administration: device policies, configuration baselines, deployment operations and compliance. 
  • Backup ownership: monitoring, restore testing, retention compliance and continual improvement. 
  • Infrastructure monitoring: dashboards, alerting improvements and increasing instrumentation. coverage. 
  • Tooling implementation: deploying and operating infrastructure tools (monitoring, inventory, endpoint tooling etc.) 
  • Security key and certificate management: renewals, storage and lifecycle management 
  • Improve processes, documentation and knowledge sharing across the SysAdmin team 
  • Support junior/mid-level SysAdmins through collaboration and knowledge transfer. 

About You

  • Strong knowledge of networks, including LAN/Wi-Fi, TCP/IP, DNS, DHCP, VLANs, routing and VPNs. 
  • Practical experience managing firewalls: rule management, NAT and segmentation 
  • Excellent hardware, technical trouble shooting and support knowledge Laptops (Windows and Apple), Desktops and Servers, Firewalls, Load balancers, Switches, NAS backups etc 
  • Strong switching experience: VLANs, routing, uplinks and redundancy. 
  • Strong Windows Server administration experience (2019/2022) 
  • Experience supporting Microsoft 365 and Intune device management. 
  • Experience supporting on-prem server environments and data centre operation 
  • Strong troubleshooting skills across networking, infrastructure platforms and endpoint environment 
  • Experience supporting backups, restores and retention processes. 
  • Confident working with server hardware, networking components and infrastructure service 
  • Excellent communication skills (technical and non-technical stakeholders) 
  • Strong attention to detail, ownership mindset and ability to work autonomously 
  • Comfortable working in a high-change environment with evolving / incomplete processe 
  • Proactive approach to documentation, continuous improvement and automation. 

Salary

This is a 6 month contract paying £400.

Extra Information

This is a hybrid opportunity, Monday to Friday 9am to 5pm