IT Infrastructure & Security Engineer

Tria; Greater London; Hybrid; GBP 60,000 - 65,000; Full time

Job summary

Tria is seeking an Operations & Security Engineer in London with a hybrid working pattern (minimum one day per month in the office). The role combines infrastructure and security to modernise the technology estate and strengthen cyber resilience.

You'll split time roughly 60/40 between infrastructure and security, delivering projects, managing Azure and on-premises environments, and driving secure, compliant changes across the Microsoft stack. This hands-on position offers meaningful impact.

Qualifications

• Extensive experience with Microsoft infrastructure technologies.
• Hands-on expertise in Microsoft Azure and on-premises integration.
• Strong Active Directory and Group Policy administration.
• VMware/vSphere experience.
• Proven ability to manage server lifecycles and platform optimisation.
• Familiarity with ITIL processes and cyber security best practices.
• Experience in cost-optimisation of Azure resources.

Responsibilities

• Lead infrastructure implementation and improvement projects.
• Manage and optimise Microsoft Azure and on-premise environments.
• Administer Active Directory, Group Policy, and virtualised setups.
• Drive server lifecycle management and platform performance enhancements.
• Implement security improvements including AD reviews and policy hardening.
• Support Cyber Essentials compliance and secure design practices.
• Identify opportunities to reduce cloud costs and optimise usage.
• Produce high-quality technical documentation and ITIL-aligned processes.
• Support occasional out-of-hours releases and future on-call.

Skills

Microsoft infrastructure

Microsoft Azure

Active Directory

Group Policy

VMware/vSphere

Server lifecycle management

ITIL

Cyber security

Tools

Microsoft Intune

PowerShell scripting

Azure cost optimisation

Reserved Instances

Resource governance

NIST/ISO security frameworks

Microsoft certifications

Job description

Operations & Security Engineer

London Hybrid (Minimum one day per month in the office)

60,000 - 65,000 + Excellent Benefits

Infrastructure. Security. Ownership.

If you're the type of engineer who enjoys building, improving and securing technology rather than simply keeping the lights on, this could be the role you've been looking for.

We're working with an organisation investing heavily in its technology estate and looking for an experienced Operations & Security Engineer to play a key role in modernising infrastructure, strengthening security and delivering technical change across a Microsoft environment.

This isn't a BAU support position. It's a hands-on project-focused role where you'll take ownership of technical workstreams, deliver infrastructure improvements and help shape a secure, resilient platform that supports the wider business.

Working as part of a small, collaborative internal technology team, you'll have the autonomy to make technical decisions, influence best practice and see your work make a genuine impact.

What you'll be doing

You'll split your time across infrastructure (around 60%) and security (40%), delivering projects that improve resilience, performance and cyber security.

Your responsibilities will include:

• Leading infrastructure implementation and improvement projects.
• Managing and enhancing Microsoft Azure and on-premise infrastructure.
• Administering Active Directory, Group Policy and virtualised environments.
• Driving server lifecycle management and platform optimisation.
• Delivering security improvements including Active Directory reviews and Group Policy hardening.
• Supporting Cyber Essentials compliance and embedding security best practice.
• Identifying opportunities to optimise Azure consumption and reduce cloud costs.
• Producing high-quality technical documentation and following ITIL-aligned processes.
• Supporting occasional out-of-hours releases and joining a future on-call rota.

What we're looking for

We're looking for someone who enjoys taking ownership and can confidently deliver technical solutions with minimal supervision.

You’ll ideally bring experience across:

• Microsoft infrastructure technologies.
• Microsoft Azure.
• Active Directory and Group Policy.
• VMware/vSphere.
• Server lifecycle management.
• Infrastructure implementation and project delivery.
• ITIL environments.
• Cyber Essentials and infrastructure security improvements.

Experience with the following would be advantageous:

• Microsoft Intune.
• PowerShell scripting and automation.
• Azure cost optimisation, Reserved Instances and resource governance.
• NIST or ISO security frameworks.
• Microsoft technical certifications.

The person

Technical capability is only part of the picture.

We're looking for someone who:

• Takes pride in delivering quality solutions.
• Is naturally curious and enjoys learning new technologies.
• Thinks commercially as well as technically.
• Can own problems from start to finish.
• Communicates confidently with both technical and non-technical stakeholders.
• Enjoys working collaboratively while being trusted to deliver independently.

Why apply?

This is an opportunity to join a business where technology is genuinely valued and where you'll have the freedom to make a real difference.

You'll work on meaningful infrastructure and security projects, have exposure to modern Microsoft technologies and be encouraged to continually develop your technical skills through ongoing learning and professional certifications.

If you're looking for a role where you can take ownership, deliver tangible improvements and help shape the future of a growing technology environment, we'd love to hear from you.