Senior Infrastructure Consultant

Role Overview:

We are seeking a Senior Infrastructure Consultant to provide senior-level consultancy, operational support, and technical leadership across complex customer environments. The role will span on-premises, hybrid, and cloud technologies, including Exchange, Microsoft 365, Azure, Windows Server, Citrix, virtualisation, backup, networking, monitoring, and security. The successful candidate will act as a senior technical escalation point, lead technical discovery and solution delivery, maintain high-quality documentation, and drive service reliability and continuous improvement. Due to the nature of the customer environments supported, candidates must be eligible to obtain UK Security Check (SC) clearance.

• Provide senior consultancy and infrastructure support across multiple managed service customers and technologies.
• Act as a technical escalation point for Microsoft Exchange, Exchange Online, Citrix, Windows Server, identity, virtualisation, networking, backup, monitoring, and cloud-related incidents and service requests.
• Support, administer, troubleshoot, and improve Microsoft Exchange Server, hybrid Exchange, Exchange Online, migrations, mail flow, security, availability, and disaster recovery.
• Support and optimise Citrix environments, including Virtual Apps and Desktops, StoreFront, Delivery Controllers, Citrix Gateway or ADC, profile management, application delivery, and associated infrastructure.
• Work with customers and internal teams to gather requirements, complete technical discovery, produce solution designs, implement changes, and deliver service improvements.
• Support hybrid and on-premises environments including VMware, Hyper-V, Windows Server, Active Directory, DNS, DHCP, Microsoft 365, Azure, backup, storage, and network services.
• Plan and deliver infrastructure upgrades, migrations, patching, lifecycle activities, resilience improvements, and remediation work with appropriate testing and rollback arrangements.
• Maintain technical designs, operational documentation, runbooks, support procedures, asset information, and knowledge articles.
• Operate within structured ITIL and ISO 20000 service management processes, including incident, problem, change, request, and configuration management.
• Mentor engineers, share knowledge, and provide clear customer-facing updates on incidents, changes, risks, recommendations, and delivery progress.
• Follow customer security requirements and support work in environments requiring UK Security Check clearance.

Department: Services Reliability Group
Function: Consulting
Experience Level: Mid-Senior Level