Senior IT Infrastructure & Server Engineer

ARCA Consulting Ltd; City Of London; Hybrid; GBP 45,000 - 52,000; Full time

Job summary

ARCA Consulting Ltd in City of London is seeking a technically strong 3rd line infrastructure professional for a hybrid role. You will provide hands-on support across cloud and on-premises Microsoft technologies, including Azure, 365, MECM/Intune, and virtualization tools.

You will join a team that handles P1/P2 incidents, maintains Active Directory and Entra ID, and collaborates across IT to ensure robust enterprise infrastructure and security posture.

Qualifications

• Technically strong, hands-on professional capable of operating at 3rd line level.
• Experience in a sizeable corporate or enterprise IT environment preferred.
• Strong familiarity with Microsoft Azure Local and Microsoft 365.
• Solid Windows Server and desktop environment experience.
• Experience with MECM/ConfigMgr and Intune for device management.
• Good networking basics and infrastructure troubleshooting.
• Experience with SQL Server, Citrix, DNS, VPN/FTPS/SFTP and enterprise backups would be beneficial.
• Excellent communication and ownership from initial investigation to resolution.

Responsibilities

• Provide hands-on 3rd line infrastructure and technical support, collaborating with Service Desk and IT teams.
• Act as escalation point for complex infrastructure issues and drive resolution.
• Lead technical response during P1/P2 major incidents across resolver teams.
• Maintain and support hybrid Microsoft infrastructure, cloud and on-premises.
• Work with Microsoft Azure, Entra ID, Active Directory and Microsoft 365.
• Manage end-user computing using MECM/ConfigMgr and Intune.
• Support Windows Server and desktops, including patching and optimization.
• Work with VMware and Hyper-V virtualization.
• Deploy software, provisioning and policy compliance via ConfigMgr and Intune.
• Investigate root causes and implement preventative solutions.
• Contribute to infrastructure projects and testing; maintain documentation and standards.
• Participate in 24/7 on-call rota for business-critical services.

Skills

3rd line support

Hybrid/enterprise IT environment

Microsoft Azure

Microsoft 365

Windows Server

ConfigMgr / MECM

Intune / Endpoint Management

Networking fundamentals

SQL Server

Citrix

DNS

VPN / Always On

MFT / FTPS/SFTP

Backup solutions

Ownership & communication

Tools

MECM / ConfigMgr

Intune / Endpoint Management

VMware

Hyper-V

Citrix

Azure Active Directory / Entra ID

Windows Server

Job description

Salary: £45,000 - 52,000 per year

Requirements:

• We are looking for a technically strong, hands‑on professional who is comfortable operating at 3rd line level.
• We ideally have experience working within a sizeable corporate or enterprise IT environment.
• We have strong experience with Microsoft Azure Local.
• We have strong experience with Microsoft 365.
• We have strong experience with Windows Server and desktop environments.
• We have strong experience with Microsoft Configuration Manager (MECM / ConfigMgr).
• We have strong experience with Microsoft Intune / Endpoint Management.
• We have strong experience with basic networking and infrastructure troubleshooting.
• Experience with SQL Server, Citrix, DNS, Always On VPN, Managed File Transfer (MFT), FTPS/SFTP and enterprise backup solutions would also be beneficial.
• We are strong problem solvers with a methodical approach to troubleshooting.
• We have good communication skills and the ability to take ownership of issues from initial investigation through to resolution.

Responsibilities:

• We provide hands‑on 3rd line infrastructure and technical support, working closely with the Service Desk and wider IT teams.
• We act as a technical escalation point for complex infrastructure issues and troubleshoot problems through to resolution.
• We take a technical lead during P1/P2 major incidents, coordinating activity across relevant resolver teams.
• We support and maintain a hybrid Microsoft infrastructure environment, covering both cloud and on‑premises technologies.
• We work extensively with Microsoft Azure, Entra ID, Active Directory and Microsoft 365.
• We manage and support the end‑user computing environment using Microsoft Configuration Manager (MECM/ConfigMgr) and Intune.
• We support Windows Server and desktop environments, including patching, upgrades, certificates and platform optimisation.
• We work with virtualisation technologies including VMware and Hyper‑V.
• We support software deployment, provisioning and policy compliance through ConfigMgr and Intune.
• We investigate recurring issues, carry out root cause analysis and implement preventative solutions.
• We contribute to infrastructure projects, technical changes and service improvements from planning through to implementation and testing.
• We maintain technical documentation and help establish infrastructure standards and best practice.
• We participate in a 24/7 on‑call rota for business‑critical services.

Technologies:

• Active Directory
• Azure
• Citrix
• Cloud
• Hyper‑V
• Support
• Microsoft 365
• Microsoft Intune
• SQL
• VPN
• VMware
• Windows
• Office 365
• DevOps

More:

We are a leading e-commerce company offering an initial 10–12 month fixed‑term contract with the potential to become permanent. The role is hybrid, with 2 days per week onsite, and provides a genuinely hands‑on infrastructure / 3rd line opportunity within a well‑established and recognisable business. You will gain exposure to a broad Microsoft, cloud and on‑premises technology environment and have the opportunity to make a real impact through infrastructure improvements and automation.

last updated 38 week of 2026