Senior Systems Engineer

Legal 500; England; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading research services company in the UK is seeking a Senior Systems Engineer to manage their modern cloud infrastructure and lead technical projects. You will be responsible for the administration of Microsoft 365, Azure/Entra ID, and help retire legacy systems. The ideal candidate will have strong experience in cloud environments, excellent problem-solving skills, and the ability to mentor junior engineers. This full-time role offers a chance to shape the technology roadmap and engage in significant modernization initiatives.

Qualifications

• Strong experience with Microsoft 365 and Azure/Entra ID administration.
• Solid understanding of identity, access governance and security controls.
• Proven ability to deliver technical projects end-to-end.

Responsibilities

• Lead administration and optimization of Microsoft 365, Entra ID/Azure AD.
• Drive infrastructure modernization, including retirement of legacy AD.
• Act as the senior escalation point for complex incidents.

Skills

Microsoft 365 administration

Azure/Entra ID administration

Identity governance

Intune

Autopilot

PowerShell scripting

Networking fundamentals

Job description

Overview

Join to apply for the Senior Systems Engineer role at Legal 500.

About the role and the impact you will have in shaping and owning our modern cloud environment and infrastructure.

About the Role

We’re looking for a Senior Systems Engineer to take ownership of our modern cloud environment and lead key infrastructure projects. This is a hands-on technical role where you’ll design and deliver practical solutions across Microsoft 365, Azure/Entra ID, and core infrastructure, while helping us retire legacy systems. You’ll act as a role model for junior engineers and play a pivotal part in shaping our technology roadmap.

What You’ll Do

• Lead administration and optimisation of Microsoft 365, Entra ID/Azure AD, Conditional Access, PIM, Intune, Autopilot and other cloud services.
• Drive infrastructure modernisation, including retirement of legacy AD, SMB and virtualisation workloads.
• Act as the senior escalation point for complex incidents, providing structured troubleshooting and root cause analysis.
• Own delivery of technical projects end-to-end, including identity uplift, passwordless rollout, security improvements, automation and SaaS integrations.
• Produce and maintain technical standards, architecture notes, runbooks and post-incident reviews.
• Mentor junior engineers and collaborate across teams to ensure solutions are secure, scalable and aligned to business needs.

What We’re Looking For

• Strong experience with Microsoft 365 and Azure/Entra ID administration.
• Solid understanding of identity, access governance and security controls.
• Proven ability to deliver technical projects end-to-end.
• Skilled in Intune, Autopilot and modern device management.
• Good networking fundamentals (routing, VPN, Wi-Fi).
• Competent in PowerShell scripting for automation and tooling.
• Clear communicator with a calm, methodical approach to problem-solving.

Interview Process

• Screening with Talent team
• 1st stage - IT Manager
• 2nd stage - Panel

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Information Technology and Engineering

Industries

• Research Services