IT Infrastructure Architect

IT Infrastructure Architect 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 Cloud, Workplace, Automation & Platform Architecture Leadership The IT Infrastructure Consultant is a senior hands‑on design authority responsible for leading solution design across Microsoft 365, Azure, Google Cloud Platform (GCP), and the Windows platform estate , with security‑by‑design, automation, and optimisation embedded as non‑negotiable principles . The role exists to materially improve service quality, speed of delivery, and cost efficiency by driving standardisation, automation‑first design, and platform optimisation . Architectures are expected to be secure, resilient, operable, and industrialised , reducing manual effort and enabling Infrastructure Operations teams to deliver at scale. Operating within the Solution Design team , the role defines target‑state architectures, standards, reference designs, and multi‑year roadmaps , and produces high‑quality, end‑to‑end solution designs that accelerate delivery while lowering operational cost and risk. This is a senior, credible technical leader role, expected to be the go‑to authority for modern workplace, cloud platform, and infrastructure automation design across the organisation. What you will do Core Architecture & Design Scope Microsoft 365 & Modern Workplace Architecture and design ownership for Microsoft 365 services including Exchange Online, SharePoint Online, OneDrive, Teams, and Intune Azure Cloud Platform Designing automation‑first Azure architectures , including Infrastructure‑as‑Code (IaC), standard pipelines, and policy‑as‑code Embedding security‑by‑design and cost optimisation into landing zones, networking, logging, and control frameworks Google Cloud Platform (GCP) Solution design and architectural governance for GCP workloads and platform services where used across the estate Windows & Core Platform Services Architecture leadership for Windows Server and Windows client platforms , including build standards, lifecycle, hardening, and automation Cross‑cutting Platform & Design Responsibilities Security‑by‑design across all platforms , including identity flows, interface security, and data protection What we're looking for Skills & Experience Essential 10+ years of experience in designing and running Microsoft 365 and Azure in complex enterprise environments Strong design authority across Windows platforms (server and client) Proven experience delivering automation‑led infrastructure and platform designs Experience owning end‑to‑end solution designs with measurable service, speed, and cost improvements Ability to balance security, resilience, automation, operability, and cost pragmatically Highly Desirable Experience designing or governing GCP platforms alongside Azure Background in regulated, large‑scale, or post‑incident transformation environments Experience defining IaC, self‑service, platform engineering, and Zero Trust / IAM architectures 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. Experience Level Senior Level