Senior Infrastructure Engineer

Overview

We are seeking an experienced Senior Infrastructure Engineer to support a secure and highly regulated environment. The role involves designing, building, administering, and supporting enterprise infrastructure services that underpin critical operational systems.

Working within a small specialist team, you will provide full lifecycle support across infrastructure platforms, ensuring services are secure, resilient, and delivered in line with strict operational requirements.

This role requires strong technical troubleshooting skills, experience in secure or air-gapped environments, and the ability to operate across 1st to 3rd line support.

Contract Details

Role: Senior Infrastructure Engineer

Location: Salisbury (Full-time onsite)

Duration: 12 months

IR35: In Scope

Rate: £569/day (Umbrella)

Clearance: Active DV required

Nationality: Sole UK Nationals only

Key Responsibilities

Design, implement, administer, and support secure infrastructure services

Manage Windows Server and desktop environments

Support compute, storage, networking, and virtualisation platforms

Administer Active Directory, Group Policy, DNS, and DHCP

Support Hyper-V virtualisation environments

Manage Microsoft SQL Server, including failover clustering

Carry out WSUS patching and Windows updates

Support secure and air-gapped environments

Provide 1st–3rd line infrastructure support

Troubleshoot and resolve infrastructure and system issues

Maintain technical documentation to operational standards

Support infrastructure upgrades, refreshes, and deployments

Monitor performance and proactively resolve issues

Essential Skills & Experience

• Strong Windows Server and desktop support experience
• Active Directory, Group Policy, DNS, DHCP administration
• WSUS patch management
• Hyper-V administration
• SQL Server administration and clustering
• Experience across 1st–3rd line support
• Experience in secure or air-gapped environments
• Strong troubleshooting and root cause analysis skills
• Ability to work independently and in small teams
• Strong documentation skills

Desirable Skills

• Linux (RHEL preferred)
• Exchange / DAG environments
• SAN storage administration
• File and print clustering
• PKI and Smartcards
• Thin client environments
• Trellix / McAfee security tooling
• Cisco networking
• VOIP / VTC support
• Hardware build and deployment

Candidate Profile

Proactive and solutions-focused

Strong analytical and troubleshooting ability

Experienced in secure environments

Clear communicator with strong documentation skills

Comfortable in complex enterprise infrastructure settings

Stable career history in infrastructure roles