Senior Infrastructure Engineer

About the Role

As a senior member of the IT Infrastructure team, you will take technical ownership of the design, implementation, and lifecycle management of both on-premises and cloud-based infrastructure across the UK estate. Acting as a subject-matter expert and senior escalation point, you will drive the reliability, performance, and security of our network, storage, server, virtualization, and integration platforms, set technical standards, and mentor other engineers.

• Own the design and delivery of scalable, resilient infrastructure solutions across physical and cloud environments, from requirements to production.
• Set technical standards for and maintain Windows Server platforms, Active Directory, Azure services, and Microsoft 365.
• Lead the design and implementation of networking solutions including access points, switches, routers, and firewalls.

• Lead the migration and integration of workloads to Microsoft Azure and drive cloud adoption best practice.
• Own cloud performance, cost optimization (Fin Ops), and security compliance across subscriptions.
• Define and own the backup and disaster recovery strategy across cloud and on-prem environments, including regular DR testing.

• Administer, monitor and manage network infrastructure, storage systems, virtualization platforms, and server hardware.
• Own the patching and upgrade strategy to ensure high availability, reliability and security.
• Design and own integrations between systems and services, including identity management and cloud connectors.

• Lead the implementation and maintenance of security controls across all infrastructure layers and drive hardening initiatives.
• Ensure infrastructure adheres to security policies and compliance standards.
• Manage the protection, patching, and vulnerability remediation of infrastructure.

• Use tools such as M365 Admin Centers, Azure Monitor, Cisco Meraki, and third-party solutions to track system and environment health.
• Troubleshoot and resolve infrastructure-related issues across physical and cloud platforms.

• Work closely with cross-functional teams including application, networking, security, and support teams.
• Act as the senior escalation point (Tier 3/4) for complex infrastructure incidents and participate in the on‑call rotation.
• Mentor and provide technical guidance to junior and mid‑level engineers, and set technical standards for the team.
• Participate in infrastructure projects and contribute to continuous improvement initiatives.
• Maintain accurate documentation of systems, configurations, procedures, and incident resolutions.
• Ensure that our culture of fostering a collaborative and customer‑focused environment helps our team be perceived as user‑centric.
• Automate common monitoring and administration activities to streamline the management of our infrastructure.

• Organisationally savvy, with the ability to engage at all levels of an organisation.
• Ability to articulate new ideas and concepts to technical and non‑technical audiences.
• Good presentation, communication and interpersonal skills.
• Ability to communicate complex problems in a non‑technical and simplified manner.
• Attention to detail and excellent analytic skills.
• Well organised and able to work on own initiative.
• Trusted and respected as a team member with strong collaboration and active listening skills.
• Displays intellectual curiosity and integrity.
• Motivated and driven by achieving long‑term business outcomes.
• Ability to work effectively in a team environment and cross‑functional teams.

• Bachelor’s degree in Computer Science, Information Technology, or related field (or equivalent experience).
• 7+ years of experience in IT infrastructure engineering, including demonstrable experience owning infrastructure design and leading migration or transformation projects, with deep hands‑on experience across Microsoft Cloud and on‑premise environments and enterprise networking solutions such as firewalls, routers, switches and access points.
• Proficiency in Microsoft technology such as…