Lead Infrastructure Engineer

Location: City of London/Essex (Office & Client Sites)
Job Type: Permanent
Salary: £50,000 - 60,000 per annum

About the Role

We're looking for an experienced Lead Infrastructure Engineer to join our growing Managed Services team.

This is a hands-on technical leadership role, ideal for someone who enjoys solving complex infrastructure challenges while mentoring a small team of engineers. You'll act as the highest technical escalation point, lead infrastructure and cloud projects, and play a key role in delivering exceptional service to our customers.

Working across Microsoft technologies, cloud platforms, networking and cyber security, you'll help shape technical standards, improve service delivery and ensure our clients receive industry-leading support.

If you're passionate about technology, enjoy customer-facing work and want to make a genuine impact within a growing business, we'd love to hear from you.

What You'll Be Doing

Technical Leadership

• Act as the highest technical escalation point for complex customer incidents.
• Mentor and support two junior engineers, providing guidance and technical leadership.
• Review and approve technical solutions before implementation.
• Develop and maintain technical standards, documentation and best practices.
• Perform root cause analysis on recurring issues and implement long-term solutions.

Infrastructure & Cloud Projects

• Lead infrastructure projects from design through to implementation.
• Deliver Microsoft 365 tenant migrations.
• Plan and execute server migrations including:
• Physical to Virtual (P2V)
• Virtual to Virtual (V2V)
• Azure Cloud migrations
• Microsoft 365 tenant-to-tenant migrations
• Lead customer onboarding and technical transition projects.
• Design secure, scalable Microsoft Cloud environments.

Microsoft Infrastructure

Support and administer:

• Microsoft 365
• Exchange Online
• SharePoint Online
• Microsoft Teams
• OneDrive
• Entra ID (Azure AD)
• Microsoft Intune
• Azure Infrastructure
• Windows Server
• Active Directory
• Group Policy
• DNS
• DHCP
• File Services

Virtualisation

Support and maintain:

• VMware
• Hyper-V

Networking & Security

• Firewalls
• VPN technologies
• LAN/WAN infrastructure
• Backup and Disaster Recovery
• Microsoft security solutions
• Cyber security best practice
• Security hardening
• Compliance and resilience

Service Delivery

• Deliver outstanding 2nd and 3rd Line support.
• Maintain SLA performance across all customer tickets.
• Use Atera RMM to manage and resolve incidents.
• Maintain accurate technical documentation within Hudu.
• Attend customer sites to install, configure and troubleshoot infrastructure where required.
• Participate in the Out of Hours support rota (maximum one week per month with additional payment).

About You

You'll be an experienced infrastructure professional who enjoys both hands-on technical work and mentoring others.

You'll have:

• Minimum 5 years' experience in an Infrastructure Engineer or Senior 3rd Line role.
• Previous experience within a Managed Service Provider (MSP) environment.
• Strong customer-facing communication skills.
• Experience leading technical projects.
• Experience mentoring or supervising engineers.
• Excellent troubleshooting and problem-solving abilities.
• A proactive and organised approach.

Essential Technical Skills

• Microsoft 365
• Azure
• Entra ID (Azure AD)
• Intune
• Exchange Online
• SharePoint Online
• Microsoft Teams
• Windows Server
• Active Directory
• Group Policy
• DNS & DHCP
• VMware
• Hyper-V
• Networking
• Firewalls
• Backup & Disaster Recovery
• Microsoft security technologies

Desirable Skills

• Azure Virtual Desktop
• Microsoft Defender
• Microsoft Sentinel
• Cyber Essentials
• PowerShell automation
• Azure networking
• Storage solutions
• Microsoft licensing knowledge

Qualifications

One or more of the following would be advantageous:

• Microsoft Certified: Azure Administrator Associate
• Microsoft 365 Enterprise Administrator
• Azure Solutions Architect
• VMware VCP
• CompTIA Network+
• CompTIA Security+
• Cyber Essentials Assessor
• ITIL Foundation