3rd Line Support Engineer

Salary: £45,000 - 55,000 per year

Requirements:

• Previous experience in a 3rd Line Engineer, Senior Infrastructure Engineer, or similar position
• Experience leading or mentoring technical engineers within a service desk or MSP environment
• Strong technical knowledge across Microsoft 365, Azure, Windows Server, networking, and virtualisation technologies
• Experience supporting complex infrastructure and cloud environments
• Strong troubleshooting and problem-solving capabilities
• Excellent communication and stakeholder management skills

Responsibilities:

• Act as the primary escalation point for complex 3rd line technical issues
• Lead and support the 3rd line engineering team across daily operations and technical delivery
• Troubleshoot and resolve advanced infrastructure, cloud, networking, and security incidents
• Support and maintain Microsoft 365, Azure, virtualisation, backup, and server environments
• Assist with project delivery, system upgrades, migrations, and infrastructure improvements
• Work closely with 1st and 2nd line teams to provide technical guidance and escalation support
• Monitor service performance and contribute to continual service improvement initiatives
• Create and maintain technical documentation and best practice processes

Technologies:

• Azure
• Cloud
• Support
• Microsoft 365
• Security
• Windows
• Office 365

More:

We are a growing Managed Service Provider based in London, offering hybrid working, training and certifications, career progression, a collaborative culture, and exposure to enterprise technologies. We are looking to hire a 3rd Line Engineer / Team Lead to support and develop our expanding technical support function. This is a fast-paced MSP environment where you will work across Microsoft 365, cloud platforms, infrastructure, cyber security, networking, and disaster recovery solutions, combining hands‑on technical work with team leadership responsibilities. You will have the opportunity to lead and develop a growing 3rd line support function, support a broad range of modern IT environments, and build your career within a growing technical team.

last updated 36 week of 2026