Infrastructure Technical Architect - Data Centre • applicants must hold an active SC clearance • Start: ASAP Location: onsite in central London 2-3 days per week We are seeking an experienced Infrastructure Architect to lead the technical design and delivery of a major on-premise data centre migration for a UK government client. This is a contract role requiring deep infrastructure expertise and strong stakeholder engagement, with a focus on robust, secure, and disruption-free migration. Key Responsibilities • Lead the end-to-end infrastructure architecture for the target data centre • Conduct assessments of existing environments, dependencies, and workloads • Design migration strategies covering tooling, sequencing, rollback, and DR • Produce HLDs/LLDs across compute, storage, networking, and security domains • Ensure alignment with enterprise architecture and compliance standards • Collaborate with project managers, technical teams, and vendors • Maintain comprehensive design documentation and architectural records • Architect solutions for high availability, resilience, and scalability • Support engineering teams during implementation and act as a technical escalation point Essential Skills: • Proven experience in data centre migrations as an Infrastructure Architect or Senior Engineer • Deep understanding of on-premise infrastructure, including: • Compute (Windows/Linux, VMware, Hyper-V) • Storage (SAN/NAS, backup, replication) • Networking (LAN/WAN, firewalls, load balancers) • IAM (Active Directory, DNS, DHCP) • Skilled in designing HA/DR enterprise solutions • Experience with discovery tools, CMDB, orchestration, and automation • Familiar with ITSM and service transition practices • Excellent communication skills, able to explain technical concepts to varied audiences • Candidates must hold an active SC Clearance • Desirable Skills: • Certifications: VMware VCAP/VCIX, Cisco CCNP/CCIE, Microsoft, TOGAF, ITIL • Experience in regulated sectors (defence, healthcare, finance) • Knowledge of hybrid infrastructure and cloud readiness