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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.
We are looking for a Security Architect specialising in the Microsoft Security platform (M365 E5) to join the Security and Resilience – Security Architecture team.
This role acts as the design authority and subject matter expert for Microsoft security technologies, including Defender, Entra ID and Purview, and will play a key role in modernising Colt’s security posture.
The successful candidate will work closely with Security Engineering, SOC, Threat Intelligence and Risk functions, as well as wider technology teams (DIO, Network Engineering, Service Delivery), to design and implement integrated, Zero Trust-aligned security architectures across the Colt estate.
The role combines:
Deep technical ownership of the Microsoft Security stack (E5)
Security design, architecture and assurance
Strategic transformation across Colt technology domains
You will play a critical role in driving:
Identity-driven and endpoint-focused security architecture for user-facing environments
Data protection and compliance capabilities through Microsoft Purview
Modern SOC enablement leveraging Defender and Sentinel telemetry alongside broader tooling
The secure adoption of Microsoft Copilot and AI/LLM-driven capabilities, ensuring appropriate governance, data protection and access controls
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Experience designing and implementing security and governance controls for AI/LLM platforms, including Microsoft Copilot integrated with Microsoft Purview
Experience consolidating endpoint and SaaS security capabilities into the Microsoft Defender ecosystem
Experience with Security Copilot and security automation
Understanding of Telecoms Security Act (TSA) requirements and implementation approaches
Experience working in regulated environments (telecommunications, financial services, critical infrastructure)
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.
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 .
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.
Job Segment: Loss Prevention, Computer Science, Information Security, Compliance, Security, Technology, Legal
Verified company details for this employer are not available yet.
Full-time
Senior · 5+ years experience
Hybrid
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