Tier 3 Network Engineer

About the Role

• If you’re the engineer others turn to when a technical issue gets complicated, this could be a great next step.
• Our client, an established IT services company, is looking for an experienced Tier 3 Network Engineer to take ownership of complex technical escalations, support infrastructure projects and provide technical guidance to other engineers.
• This is a hands-on role in a Managed Service Provider (MSP) environment, working across multiple client networks and infrastructure platforms.
• You’ll work with Fortinet, Windows Server, Microsoft 365, Azure, VMware, Hyper-V, networking and security technologies. You’ll also have the opportunity to mentor engineers and contribute to technical projects.

Responsibilities

• Resolve complex Tier 3 incidents escalated by Tier 1 and Tier 2 engineers.
• Troubleshoot network, firewall, server, cloud, virtualisation and security issues.
• Configure and maintain firewalls, switches, VPNs, VLANs, wireless networks and LAN/WAN connectivity.
• Support Windows Server, Active Directory, Microsoft 365, Entra ID, Intune and Azure environments.
• Manage VMware and Hyper-V virtualisation environments.
• Support backup, disaster recovery, endpoint protection and email security solutions.
• Investigate recurring incidents, identify root causes and implement preventative solutions.
• Plan and deliver infrastructure upgrades, migrations, firewall replacements and cloud deployments.
• Prepare technical documentation, project plans, Statements of Work and bills of materials.
• Mentor junior engineers and provide technical guidance during escalations.
• Communicate with clients, manage technical expectations and maintain service delivery standards.
• Identify opportunities to improve infrastructure reliability, monitoring and automation.

Requirements

• Minimum 6 years’ experience in IT support, network engineering or infrastructure, preferably within an MSP environment.
• Proven Tier 3 experience resolving complex technical issues independently.
• Strong networking knowledge covering TCP/IP, DNS, DHCP, subnetting, VLANs, routing, switching, VPNs and LAN/WAN.
• Hands-on experience with Fortinet FortiGate firewalls and network security.
• Advanced knowledge of Windows Server, Active Directory and Group Policy.
• Experience with Microsoft 365, Exchange Online, Entra ID, Intune and Azure.
• Experience with VMware vSphere/ESXi and/or Microsoft Hyper-V.
• Knowledge of SAN/NAS storage, backups and disaster recovery, ideally Veeam or Acronis.
• Familiarity with endpoint security, EDR and remote monitoring tools such as Sophos, Barracuda or equivalent solutions.
• PowerShell scripting and automation skills.
• Understanding of incident, problem and change management.
• Experience guiding engineers and delivering technical infrastructure projects.
• Strong troubleshooting, documentation and client communication skills.

Advantageous Certifications

• Relevant Fortinet, CCNA, Microsoft Azure (AZ-104), Microsoft 365, VMware, Veeam, Sophos or ITIL certifications will be advantageous.
• Practical technical experience is equally important.