Head of Infrastructure Architecture - Executive Director

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The Dev Sec Ops  architect will enable delivery of:

• Published target-state infrastructure architecture and placement policy, endorsed at Design Authority.
• Agreed and sequenced data centre exit plan with named workloads, waves and dates.
• VDI consolidation roadmap approved, with the first platform migration wave delivered.
• Baseline infrastructure cost model established, and a measurable reduction path committed.

Own the target-state infrastructure architecture across end-user compute, data centre estate and cloud, and drive the consolidation of three historically separate estates into one coherent, cost-managed platform. This is a consolidation and exit role as much as a design role: the measure of success is estate reduction, not estate growth.

Duties and Responsibilities

• Define the target-state infrastructure architecture spanning virtual desktop infrastructure, physical and colocated data centres, and public cloud, with a clear placement policy governing what runs where and why.
• Lead the data centre rationalisation programme: workload discovery and dependency mapping, migration wave planning, exit sequencing, and lease/contract alignment.
• Consolidate the VDI and end-user compute estate — rationalise brokers, images, profile management and licensing; define persona-based desktop patterns; set the roadmap from legacy VDI toward a single strategic platform.
• Design cloud landing zones, network topology, identity integration, and hybrid connectivity to support migration at scale without re-platforming the operating model per application.
• Establish infrastructure standards: compute and storage tiering, virtualisation, backup and archive, patching, and infrastructure-as-code baselines.
• Own resilience architecture — disaster recovery tiering, recovery time and point objectives, failover design and testing — aligned to operational resilience and important business service requirements.
• Build and maintain the infrastructure cost model; drive unit economics, capacity forecasting and rightsizing; make consumption visible to service owners.
• Partner with network, security, EUC and platform engineering teams to sequence dependencies and avoid stranded estate.
• Provide assurance at Design Authority for infrastructure change; challenge project-level decisions that create new estate outside the target state.

Qualifications, Skills and Experience

• Substantial infrastructure architecture experience in a regulated enterprise, with at least one end-to-end data centre consolidation, migration or exit delivered.
• Demonstrable ownership of a VDI or end-user compute estate at enterprise scale, including a platform migration or consolidation.
• Hands-on architecture across at least one major public cloud, covering landing zone design, networking, identity and migration patterns.
• Proven capability in workload discovery and dependency analysis for legacy estate, including undocumented systems.
• Track record of infrastructure cost reduction supported by evidence, not forecast.

Technical skills:

• VDI / EUC:
  Citrix, Azure Virtual Desktop, VMware Horizon, Windows 365; image and profile management, application layering, session sizing
• Data centre: virtualisation platforms, SAN/NAS storage, converged and hyper-converged infrastructure, colocation and hosting models, capacity and power planning
• Cloud:
  Azure and/or AWS landing zones, hybrid connectivity (Express Route, Direct Connect), migration tooling and patterns (rehost, re-platform, refactor)
• Resilience: DR design and testing, backup architecture, multi-site and multi-region patterns
• Financial services infrastructure experience, particularly low-latency or market-data-adjacent environments.
• Expe…