3rd Line Support Engineer

3rd Line Support Engineer / Senior Infrastructure Engineer

Job Type: Full-time, Permanent

Location: Huntingdon, Cambridgeshire

Our client is a well-established IT services provider delivering secure, reliable, and high-performing technology solutions. They are now seeking an experienced 3rd Line Support Engineer to take ownership of complex escalations, lead infrastructure improvements, and support the ongoing development of client environments.

The Role

You will act as the highest level of technical escalation while also leading technical projects and maintaining the stability, security, and performance of client infrastructure.

Final escalation point for complex and business-critical incidents

Advanced troubleshooting across Microsoft 365, Windows Server, and Active Directory

Design and manage cloud environments across Azure, AWS, and Google Cloud

Lead virtualisation platforms including Hyper-V and VMware

Own high-level networking, firewalls, VPNs, VLANs, and Wi-Fi

Lead infrastructure upgrades, migrations, security improvements, and cloud projects

Produce technical documentation and mentor 1st and 2nd Line engineers

What You'll Bring

Proven experience in a 3rd Line or Senior Infrastructure role

Strong Microsoft 365, Windows Server, and cloud infrastructure expertise

Advanced networking and virtualisation experience

Backup, resilience, and disaster recovery knowledge

Excellent communication and stakeholder management skills

Proactive, improvement-focused mindset

Full UK driving licence required

Benefits

Competitive senior-level salary (DOE)

25 days annual leave + increases with service

Employee perks via Perkbox

24/7 GP access + EAP

Funded training and certifications

Cycle to Work & Electric Car schemes

Free on-site parking

Experience Required: 4-5+ years in 2nd/3rd Line or infrastructure roles