3Rd Line Infrastructure Engineer

Constant Recruitment Ltd; Salisbury; On-site; GBP 32,000 - 40,000; Full time

Job summary

A Managed Service Provider in Salisbury is looking for an experienced 3rd Line Infrastructure Engineer. In this hybrid role, you will provide support, lead projects, and mentor junior engineers. Essential skills include Windows Server, Microsoft 365 administration, and network troubleshooting. A full UK driving license is required for client site visits. This position offers exposure to various technologies and fosters a culture of learning and initiative.

Qualifications

• Experience in a 2nd/3rd line role within an MSP environment.
• Strong communication skills and client-facing confidence.
• A methodical and calm approach under pressure.
• Full UK driving licence and access to your own vehicle.

Responsibilities

• Providing 3rd line support and infrastructure troubleshooting.
• Leading smaller client projects and rearchitecting customer networks.
• Acting as an escalation point for complex issues.
• Installing, configuring, and supporting client environments across servers, networks, and cloud platforms.
• Mentoring junior engineers and ensuring quality technical delivery.
• Attending client sites when required.

Skills

Windows Server

Microsoft 365

Active Directory

Networking

TCP/IP

Remote troubleshooting

On-site troubleshooting

Job description

3rd Line Infrastructure Engineer

Salisbury – Hybrid working (mix of office, home, and client site)

32,000 – £40,000 DOE

Driving licence required – client site visits involved

Are you an experienced 3rd Line Engineer with a solid MSP background?

Do you enjoy tackling a mix of infrastructure and networking challenges?

Looking for a role that keeps you hands-on, technical, and client-facing?

This role could be a great fit.

Join a growing and well-regarded Managed Service Provider as part of their senior engineering team. You will take ownership of escalated issues, support and guide more junior engineers, and lead on technical projects for a range of SME clients.

What you will be doing :

• Providing 3rd line support and infrastructure troubleshooting
• Leading smaller client projects and rearchitecting customer networks
• Acting as an escalation point for complex issues
• Installing, configuring, and supporting client environments across servers, networks, and cloud platforms
• Mentoring junior engineers and ensuring quality technical delivery
• Attending client sites when required (local travel)

Core technical skills we are looking for :

• Windows Server (setup, troubleshooting, maintenance)
• Microsoft 365 administration and support
• Active Directory & Group Policy
• Network support – routers, switches, firewalls (WatchGuard experience a bonus)
• TCP / IP, DNS, DHCP
• Strong experience with remote and on-site troubleshooting
• Comfortable working across a broad IT estate (hardware, software, cloud, networking)
• Experience delivering infrastructure projects and identifying opportunities for improvement

You will need :

• Experience in a 2nd / 3rd line role within an MSP environment
• Strong communication skills and client-facing confidence
• A methodical and calm approach under pressure
• Full UK driving licence and access to your own vehicle

This is a varied and rewarding role that offers technical autonomy, exposure to different technologies, and a culture that values learning and initiative.

If you are ready for a new challenge where no two days are the same — we would love to hear from you.