Senior 3rd Line Engineer - Microsoft 365, Networking & Infrastructure

MSP | 3rd Line Support | Microsoft 365 | Networking | Infrastructure

Some Engineers Escalate Problems. Others Own Them.

When the easy fixes have been exhausted, who does the team turn to?

We're looking for an experienced Senior 3rd Line Engineer who enjoys solving the technical problems others can't. Someone who combines strong Microsoft infrastructure and networking expertise with sound judgement, clear communication and genuine ownership.

You’ll become the trusted technical counterpart to our Service Delivery Manager, helping resolve complex customer issues, supporting the wider engineering team and ensuring our customers receive an exceptional managed service.

If you're an experienced MSP engineer who enjoys variety, autonomy and making a real technical impact, we'd love to hear from you.

• Senior 3rd Line Engineer
• Aston Cross, Birmingham – Office Based Initially (3–6 Months) | Hybrid Working (3 Days Office / 2 Days Home)
• Competitive Salary DOE + Excellent Benefits
• Permanent | Full Time
• Reporting to:
  Service Delivery Manager

Pedigree:
Leading Microsoft Partner & Managed Services Provider

• MSP, 3rd Line Support
• Microsoft 365 – 5/5 (Essential)
• Entra  – 5/5 (Essential)
• Networking – DNS, DHCP, VPNs, Firewalls & Troubleshooting – 4/5 (Important)
• Power Shell / Scripting – 4/5 (Important)
• Cloud Troubleshooting – 3/5 (Some Experience)
• Microsoft Defender – 2/5 (Desirable)
• Azure – 2/5 (Some Experience)

Experience:

At least five years' experience in a senior 2nd Line or 3rd Line technical support role, ideally in an MSP or multi-customer environment, with strong hands‑on networking and Microsoft infrastructure experience.

Nexian is a leading technology partner specialising in Managed IT Services, Microsoft Cloud, Cyber Security, AI, Automation and Digital Transformation.

We help ambitious organisations modernise, secure and optimise their technology through a combination of strategic consultancy, managed services and technical expertise.

Alongside our Managed Services business, we're recognised as one of the UK's leading Actionstep implementation partners, supporting legal, professional services and other ambitious organisations with technology that enables long‑term growth.

We're a collaborative, ambitious business where ownership is encouraged, good ideas are welcomed and people genuinely enjoy working together.

This role bridges the gap between our Service Desk and Senior Architect.

You’ll take ownership of the most technically challenging support issues, using your experience to investigate thoroughly, make informed decisions and resolve problems wherever possible before specialist architectural support is required.

Networking will be an important part of your technical remit, so you’ll need the confidence to investigate and resolve complex connectivity, firewall, VPN and wider network infrastructure issues across multiple customer environments.

Alongside hands‑on technical work, you’ll mentor engineers, improve technical standards and work closely with the Service Delivery Manager to continually strengthen our Managed Services operation.

• Take ownership of complex 3rd Line incidents and service requests from investigation through to resolution.
• Support Windows Server, Active Directory, Microsoft 365, Exchange Online, Teams, SharePoint, Entra , Intune and Microsoft Defender environments.
• Diagnose and resolve complex networking issues involving DNS, DHCP, VPNs, firewalls, routing, switching and network connectivity.
• Troubleshoot virtualisation, backup and wider infrastructure issues across multiple customer environments.
• Invest…