Infrastructure Support Engineer

Orla Rose Associates Ltd; Greater London; On-site; GBP 55,000 - 75,000; Part time

Job summary

Orla Rose Associates Ltd in London is seeking an experienced Desktop & Infrastructure Support Engineer for a 6-month fixed-term contract, with potential for extension. You will be the senior escalation point for desktop and broader IT infrastructure, supporting users at all levels and driving stability and security across the environment.

You will handle complex incidents, work with Microsoft 365, Entra ID and AD, and coordinate with suppliers on upgrades and security improvements in a

Qualifications

• Proven experience at 2nd/3rd line escalation on desktop/infrastructure issues.
• Strong knowledge of Windows desktop/server environments and Microsoft 365.
• Expertise in Active Directory and Entra ID administration and security.
• Solid networking basics including TCP/IP, DNS, DHCP, VPNs and Wi‑Fi.
• Experience with endpoint deployment, patching and management tools.
• Familiarity with virtualization, backup, monitoring and disaster recovery.
• Excellent troubleshooting and independent problem-solving abilities.
• Good communication skills to support senior stakeholders in a regulated financial setting.
• Desireable: PowerShell scripting and relevant Microsoft/cloud qualifications.

Responsibilities

• Serve as escalation point for complex desktop and infrastructure issues.
• Support Windows 10/11, Microsoft 365, Active Directory and Entra ID users.
• Manage endpoints, software deployment, patches and device configurations.
• Support servers, networks, virtual environments, storage and cloud services.
• Troubleshoot TCP/IP, DNS, DHCP, VPN and Wi‑Fi problems across the business.
• Monitor infrastructure performance, security and availability; ensure backups and recovery readiness.
• Control access and permissions; uphold security controls and compliance.
• Own incidents end-to-end and perform root-cause analysis for improvements.
• Collaborate with third‑party vendors on upgrades and projects.

Skills

3rd Line Support

Windows Administration

Microsoft 365

Active Directory

Entra ID

Networking (TCP/IP)

VPNs & Wi‑Fi

Endpoint Management

PowerShell

Security & IAM

Job description

Location: London – Moorgate / Liverpool Street

Initial 6 Month FTC – Potential to Extend (permanent)

Start ASAP

We’re recruiting an experienced Desktop & Infrastructure Support Engineer to join the London IT team of a leading financial services business. This is a broad, hands‑on role combining high‑quality desktop support with responsibility for the stability, security and performance of the wider IT infrastructure. You’ll act as a senior technical escalation point, taking ownership of complex 2nd and 3rd-line issues and supporting users across all levels of the business.

The role will involve:

• Acting as the escalation point for complex desktop and infrastructure issues
• Supporting Windows 10/11, Microsoft 365, Active Directory and Entra ID
• Managing endpoint configuration, software deployment, patching and devices
• Supporting servers, networks, virtual environments, storage and cloud services
• Troubleshooting TCP/IP, DNS, DHCP, VPN and Wi‑Fi issues
• Monitoring infrastructure performance, availability and security
• Supporting backup, recovery, antivirus and business continuity
• Managing user access, permissions and security controls
• Owning incidents through to resolution and carrying out root‑cause analysis
• Supporting infrastructure changes, upgrades and improvement projects
• Working with third‑party technology suppliers and partners

What we’re looking for:

• Strong experience as a Desktop & Infrastructure Engineer, 3rd Line Support Engineer or similar
• Broad Microsoft desktop, server and cloud knowledge
• Strong Windows, Microsoft 365, Active Directory and Entra ID experience
• Good networking knowledge across TCP/IP, DNS, DHCP, VPNs and Wi‑Fi
• Experience with endpoint management, deployment and patching tools
• Knowledge of virtualisation, backup, monitoring and disaster recovery
• Excellent troubleshooting skills and the ability to resolve complex issues independently
• Strong understanding of information security and access management
• Confident communication skills with the ability to support senior stakeholders
• Previous experience within investment banking, financial services or another regulated environment would be highly desirable, as would PowerShell experience and relevant Microsoft, cloud, networking or IT service management qualifications.

This would suit an experienced engineer who enjoys variety, takes ownership and is comfortable working in a fast‑paced, business‑critical environment.

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