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.Deep technical ownership of the Microsoft Security stack (E5)Data protection and compliance capabilities through Microsoft PurviewThe secure adoption of Microsoft Copilot and AI/LLM-driven capabilities, ensuring appropriate governance, data protection and access controlsAct as the design authority for Microsoft Security architecture, covering Defender, Entra ID and Purview capabilitiesDefine and maintain the target architecture for the Microsoft security platform, aligned to Colt's Zero Trust strategyLead the design and implementation of Microsoft Defender capabilities across endpoints, identities and user-facing services, ensuring integration with wider security tooling where requiredDefine appropriate integration patterns between Microsoft Defender and non-Microsoft security tooling, particularly across server and infrastructure environmentsDesign and deliver Microsoft Purview solutions, including Data Loss Prevention (DLP), Information Protection, Insider Risk and data governanceDefine and implement identity-first security controls using Entra ID (P2), including Conditional Access,



MFA and Privileged Identity Management (PIM)Support the modernisation of Colt's SOC operating model, leveraging Defender and Sentinel for user and endpoint telemetry, alongside integration of broader infrastructure data sourcesConduct security architecture reviews and provide assurance for solutions leveraging Microsoft security technologies, including defining requirements and supporting formal sign-off or risk acceptanceEnsure consistent deployment and operationalisation of Microsoft security capabilities at scale, across a complex, hybrid estateDrive adoption of Secure by Design principles across Microsoft-based platforms and solutionsDefine and implement security and governance controls for Microsoft Copilot and AI/LLM services, ensuring enterprise data is appropriately protectedAssess and mitigate risks associated with AI/LLM usage, including prompt injection, data leakage, over-permissioned access and unintended data exposureEnsure AI-enabled services follow Zero Trust principles, enforcing least-privilege access to enterprise data accessed by Copilot and related toolsEngage with Microsoft and other vendors to stay aligned with emerging capabilities and roadmap developments, particularly across XDR, data protection and AIProduce high-quality architecture artefacts, standards and guidance documentation5+ years of experience in information security within large-scale enterprise or telecommunications environments~ Deep expertise in Microsoft 365 E5 security capabilities, including:~ Microsoft Defender (Endpoint, Identity, Office 365, Cloud Apps)~ Microsoft Entra ID (P2),



Conditional Access and identity protection~ Microsoft Sentinel (SIEM integration)~ Microsoft PurviewStrong experience designing and implementing Microsoft Purview capabilities, including DLP, Information Protection, Insider Risk and eDiscoveryExperience conducting security design reviews and translating policy into practical controlsStrong understanding of cloud security concepts across IaaS, PaaS and SaaS, particularly within Azure environmentsGood understanding of networking and enterprise platforms (Windows/Active Directory, Linux/Unix environments)Engineering/Computer Science degree or equivalent practical experienceUnderstanding of security risks associated with AI/LLM technologies, including prompt injection, data leakage and over-permissioning risks (e.G. Microsoft Copilot)Fluent in English (technical and non-technical communication)Experience designing and implementing security and governance controls for AI/LLM platforms, including Microsoft Copilot integrated with Microsoft PurviewExperience consolidating endpoint and SaaS security capabilities into the Microsoft Defender ecosystemOur integral 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. Signed the UN Women Empowerment Principles which guide our Gender Action PlanFlexible working hours and the option to work from home.Global Family Leave Policy.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.#

📌 Security Architect - Microsoft Security Platform (Barcelona)
🏢 Colt Technology Services
📍 Barcelona