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IT Manager, enterprise infrastructure services & cloud

Job id:  36123
Job location: 

London, GB

Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure.

Why we need this role

The Manager IT Infrastructure (M365, Azure, GCP, Windows & VDI) is responsible for the end-to-end delivery, operation, and performance of critical enterprise platforms, including Microsoft 365, Azure, GCP, Windows Server, VDI, and Citrix services.
The role leads a team of approximately 15 engineers, ensuring the secure, stable, and efficient operation of business-critical services, while delivering roadmap initiatives, platform improvements, and automation outcomes aligned to architecture and strategy.
Working closely with Architecture, Security, Development, and wider Operations teams, the role ensures solutions are delivered, integrated, and operated at scale, with strong focus on service reliability, security, cost efficiency, and user experience.
The role embeds operational excellence, resilience, automation, and governance, driving standardisation and continuous improvement across cloud, workplace, and identity platforms. Through strong leadership and execution, it reduces risk, complexity, and operational overhead, while improving service performance, stability, and cost control.

What you will do

Leads engineering and operational delivery across M365, Azure, GCP, Windows, and VDI platforms, ensuring services, tooling, and integrations are secure, resilient, scalable, and operationally effective.

  • Microsoft 365 Platforms: Ownership of collaboration and productivity services (Teams, Exchange, SharePoint, OneDrive, Intune), including service performance, governance, security, lifecycle, and user experience.
  • Azure & GCP Cloud: Operational management of cloud platforms including landing zones, subscriptions/projects, connectivity, platform services, and governance controls.
  • Windows & End User Platforms: Management of Windows Server and end-user compute platforms, including build, patching, configuration, and lifecycle.
  • VDI & Citrix: Delivery and operation of virtual desktop environments, ensuring performance, availability, and user experience.
  • Identity & Access: Operational ownership of Active Directory and Entra ID, including authentication, Conditional Access, privileged access, and directory services.
  • Cloud Security & Compliance: Enforcement of secure configurations, monitoring, logging, and policy controls across all platforms.
  • Leads delivery of standardisation, automation, tooling, and operational consistency across cloud and workplace platforms

Key Accountabilities

  1. Service Delivery, Engineering & Operations
    •    Lead the build, delivery, and operation of critical infrastructure services across M365, cloud, Windows, and VDI
    •    Ensure platforms meet availability, performance, and service level expectations
    •    Act as senior escalation point for major incidents and service issues
  2.  Security, Resilience & Service Stability
    •    Ensure secure-by-design and operational security controls are implemented and maintained
    •    Own resilience, recoverability, monitoring, and service continuity across platforms
  3. Roadmap Delivery & Continuous Improvement
    •    Deliver platform roadmaps and improvement initiatives in line with architectural direction
    •    Drive continuous improvement in automation, efficiency, and service quality
  4. Team Leadership & Capability Development
    •    Lead and develop a high-performing engineering team (FTE & contingent)
    •    Build capability across cloud, workplace, and identity domains
    •    Ensure effective workload management, prioritisation, and delivery
  5. Cross-Domain Collaboration & Integration
    •    Work with Architecture, Security, Development, and Operations teams to deliver integrated services
    •    Ensure solutions are fully transitioned, supported, and operationally sustainable
  6. Vendor & Service Management
    •    Ensure service performance, delivery quality, and issue resolution
  7. Operational Governance, Cost & Optimisation
    •    Ensure services are aligned to standards and governed through full lifecycle
    •    Manage operational cost, capacity, and efficiency
    •    Drive automation, standardisation, and reduction of technical debt and complexity

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Leadership & Behavioural Expectations

Operates as a senior leader with strong ownership, accountability, and delivery focus.

  • Ownership & Accountability: Owns service outcomes across availability, security, and cost
  • Leadership & Team Development: Builds, leads, and develops high-performing teams
  • Execution & Delivery: Drives consistent, high-quality service and platform delivery
  • Collaboration & Influence: Works effectively across domains and stakeholders
  • Adaptability & Improvement: Responds to operational challenges while driving automation and optimisation

What we’re looking for

Essential

  • Extensive experience leading infrastructure engineering and operations teams in enterprise environments
  • Strong expertise across Microsoft 365 and workplace services, Azure and GCP cloud operations, Windows Server, VDI/Citrix, and identity (Active Directory, Entra), with robust knowledge of security, resilience, operational controls, and automation tooling.
  • Proven ability to manage business-critical services at scale
  • Strong stakeholder, vendor, and team leadership capability 
  • Excellent operational, analytical, and decision-making skills

 

Soft Skills & Behavioural Competencies

  • Ownership & Accountability: Takes responsibility for delivering outcomes and driving technical excellence.
  • Leadership & Influence: Ability to inspire, motivate, and guide team members toward achieving goals.
  • Communication: Clear and concise verbal and written communication skills for technical and non-technical audiences.
  • Problem-Solving: Strong analytical skills to troubleshoot complex issues and implement effective solutions.
  • Collaboration: Skilled at building relationships and working effectively across teams and stakeholders.
  • Adaptability: Comfortable managing priorities in a fast-paced, evolving environment.
  • Continuous Improvement Mindset: Proactive in identifying opportunities for process and technology enhancements.

 

Qualifications

  • Bachelor’s degree in Computer Science, Information Technology, or equivalent experience.
  • Relevant certifications (e.g., Microsoft Certified: Azure Solutions Architect, Citrix Certified Expert, VMware VCP, Google Cloud Professional Architect) preferred.

What we offer you:

Looking to make a mark?

At Colt, you’ll make a difference. Because around here, we empower people. We don’t tell you what to do.

Instead, we employ people we trust, who come together across the globe to create intelligent solutions.

Our global teams are full of ambitious, driven people, all working together towards one shared purpose: to put the power of the digital universe in the hands of our customers wherever, whenever and however they want.

We give our people the opportunity to inspire and lead teams, and work on projects that connect people, cities, businesses, and ideas. We want you to help us change the world, for the better.

 

 

Diversity and inclusion

  • Inclusion and valuing diversity of thought and experience are at the heart of our culture here at Colt. From day one, you’ll be encouraged to be yourself because we believe that’s what helps our people to thrive. We welcome people with diverse backgrounds and experiences, regardless of their gender identity or expression, sexual orientation, race, religion, disability, neurodiversity, age, marital status, pregnancy status, or place of birth.

 

Most recently we have:

  • Signed the UN Women Empowerment Principles which guide our Gender Action Plan
  • Trained 60 (and growing) Colties to be Mental Health First Aiders
  • Please speak with a member of our recruitment team if you require adjustments to our recruitment process to support you. For more information about our Inclusion and Diversity agenda, visit our DEI pages.

 

 

Benefits

Our benefits support you through all parts of life, for both physical and mental health.

  • Flexible working hours and the option to work from home.
  • Extensive induction program with experienced mentors and buddies.
  • Opportunities for further development and educational opportunities.
  • Global Family Leave Policy.
  • Employee Assistance Program.
  • Internal inclusion & diversity employee networks.

 

 

A global network

  • When you join Colt you become part of our global network. We are proud of our colleagues and the stories and experience they bring – take a look at ‘Our People’ site including our Empowered Women in Tech.


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