2nd​/3rd Line Infrastructure Engineer - DV Cleared

DV Cleared 2nd/3rd Line Infrastructure Engineer (Wintel)

Location:

London (Full-time, 100% onsite)
Salary: £60,000 - £70,000 + Bonus
Security Clearance:
Active DV Clearance Required

Overview

We are seeking an experienced DV Cleared 2nd/3rd Line Infrastructure Engineer to join a highly secure and mission-critical environment based in London. This is a hands-on technical role focused on supporting, maintaining, and enhancing enterprise Wintel infrastructure within a complex, high-security setting.

Working as part of an established infrastructure team, you will provide 2nd and 3rd line support across core services and platforms, taking ownership of technical incidents, problem resolution, system improvements, and infrastructure lifecycle activities.

Key Responsibilities

Provide 2nd and 3rd line support for Windows-based infrastructure and core services
Administer and support Active Directory environments, including Group Policy, DNS, DHCP, and user/device management
Support and maintain VMware virtualised infrastructure environments
Investigate, troubleshoot, and resolve complex infrastructure incidents and problems
Perform system patching, upgrades, maintenance, and lifecycle management activities
Implement and maintain security best practices within a highly regulated environment
Create and maintain technical documentation, support procedures, and operational runbooks
Work closely with infrastructure, network, and security teams to support business-critical services
Contribute to continuous improvement initiatives and infrastructure optimisation projects
Participate in technical escalations and provide support for major incidents when required

Essential Skills & Experience

Active Developed Vetting (DV) clearance - must be current and transferable
Proven experience in a 2nd/3rd line infrastructure support or engineering role
Strong Wintel infrastructure support experience within enterprise environments
In-depth knowledge of:
Windows Server (2016/2019/2022)
Active Directory, Group Policy, DNS, and DHCP
VMware vSphere / ESXi
Excellent troubleshooting and diagnostic skills across core infrastructure technologies
Experience working within secure, enterprise, government, or defence environments
Ability to work full-time onsite in London

Desirable Skills

Power Shell scripting and automation

Experience with backup and recovery solutions
Knowledge of infrastructure monitoring tools (e.g. SCOM or equivalent)
Exposure to highly secure, classified, or air-gapped environments
Experience supporting mission-critical systems and services

What's on Offer

Competitive salary of £60,000 - £70,000
Annual bonus scheme
Opportunity to work within a highly secure, mission-critical environment
Long-term career opportunity supporting nationally important systems
Collaborative and technically challenging working environment