Senior IT Support Engineer

Salary: £30,000 - 53,000 per year

Requirements:

• Proven experience in a Senior 2nd Line or 3rd Line IT Support role within an enterprise environment.
• Strong experience supporting Microsoft technologies including Microsoft 365, Windows Server, Active Directory, Azure/Entra ID, Exchange Online, DNS, DHCP, and Group Policy.
• In-depth knowledge and hands-on experience managing enterprise firewalls, including VPNs, NAT, security policies, and threat protection.
• Strong networking knowledge covering TCP/IP, VLANs, routing, switching, wireless networking, and network troubleshooting.
• Demonstrable experience delivering IT infrastructure projects from planning and design through implementation, testing, documentation, and completion.
• Experience working with virtualisation platforms such as VMware or Hyper-V.
• Knowledge of backup, disaster recovery, cybersecurity tools, and security best practices.
• Excellent troubleshooting, analytical, and problem-solving skills.
• Strong customer service, communication, and stakeholder management abilities.
• Ability to manage multiple priorities, work independently, and meet deadlines.
• Proactive, organised, and self-motivated with a continuous improvement mindset.
• Relevant IT qualifications or degree desirable.
• Microsoft certifications and networking or firewall certifications are advantageous.

Responsibilities:

• Provide 2nd and 3rd Line technical support for users across multiple sites.
• Investigate, troubleshoot, and resolve complex hardware, software, server, network, and infrastructure issues.
• Act as the primary technical escalation point for the Service Desk team.
• Administer and support Microsoft 365 services, Azure AD/Entra ID, Windows Server, Active Directory, DNS, DHCP, and Group Policy.
• Configure, maintain, and troubleshoot networking infrastructure including switches, routers, wireless solutions, VPNs, and enterprise firewalls.
• Take ownership of firewall administration, including security policies, NAT, VPN configuration, rule management, firmware updates, monitoring, and troubleshooting.
• Ensure network security best practices are maintained through firewall optimisation, vulnerability remediation, and access control management.
• Lead and deliver IT infrastructure projects from initial scoping and planning through implementation, testing, documentation, user handover, and post-project support.
• Work with internal stakeholders to gather technical requirements, produce implementation plans, and ensure projects are delivered on time and within scope.
• Perform system upgrades, patch management, software deployments, and infrastructure improvements.
• Monitor system performance and proactively identify opportunities to improve availability, reliability, and security.
• Maintain accurate technical documentation, knowledge base articles, network diagrams, and operational procedures.
• Support backup, disaster recovery, and business continuity solutions.
• Liaise with third-party vendors and managed service providers where required.
• Ensure compliance with IT security policies, industry best practices, and regulatory requirements.
• Mentor and provide technical guidance to junior IT engineers and Service Desk analysts.

Technologies:

• Active Directory
• Azure
• Cloud
• Firewall
• Firmware
• Hardware
• Hyper-V
• Support
• Microsoft 365
• NAT
• Network
• Security
• TCP/IP
• VPN
• VMware
• Windows
• Office 365
• Cisco

More:

We are seeking an experienced Senior IT Support Engineer with 3rd Line Support expertise to join our clients growing IT team in Northampton. This is a full-time permanent hybrid role, Monday to Friday, offering a salary of up to 42,000 DOE. The successful candidate will help resolve complex technical issues, maintain and improve IT infrastructure, support business-critical systems, and lead IT projects from planning through implementation and handover. We offer the opportunity to work across desktop, server, network, cloud, and security technologies in a role with real scope to influence infrastructure, improve service delivery, and mentor junior team members.

last updated 35 week of 2026