Senior Infrastructure Engineer

Unify Talent - IT, Digital & Tech Recruitment; Gatwick; Hybrid; GBP 55,000 - 85,000; Full time

Benefits offered by this job

28 days annual leave

Buy / sell annual leave

Hybrid working arrangements

Work from anywhere policy up to 20?0?0

Volunteering leave

Financial wellbeing

Discretionary bonus scheme

Pension 6% company contribution

Salary sacrifice car leasing

Private medical AXA healthcare

Life assurance up to 4x salary

Enhanced sick pay

EAP mental health support

Cycle to work scheme

Discounts

Job summary

Unify Talent - IT, Digital & Tech Recruitment in the United Kingdom is seeking a Senior Infrastructure Engineer to ensure stability, security and resilience across three sites. The role is hands-on and the senior technical escalation point for infrastructure incidents.

You will manage Windows Server, Nutanix/Hyperconverged environments, Microsoft 365 security, backups, networks and reporting, while supporting around 100 staff.

Qualifications

• Significant hands-on experience in an Infrastructure role.
• Experience of on-premise and cloud environments.
• Experience of supporting a multi-site environment.
• A track record of improving the stability of an infrastructure environment and resolving recurring problems.
• Experience of supporting users directly alongside infrastructure responsibilities.

Responsibilities

• Administer Nutanix virtualization, Windows Server 2022 and Linux services.
• Manage Microsoft 365 security, Entra ID, Conditional Access and Defender.
• Maintain backups with HYCU/Nutanix and perform restore tests.
• Provide hands-on user support across sites, in person and remotely.
• Lead triage, root-cause analysis and post-incident reviews.

Skills

Windows Server administration

Backup and disaster recovery

Enterprise networking

Microsoft 365 security

Published application delivery

Documentation and troubleshooting

Calm and approachable communication

Tools

Parallels RAS

FSLogix

Citrix

RDS

Halo ITSM

Job description

The Senior Infrastructure Engineer is responsible for the stability, security and resilience of the organisation's IT infrastructure across 3 sites. The role is hands‑on and sits within a small IT team. It covers platforms, networks, Microsoft 365 security and the infrastructure behind business‑critical applications, as well as direct support for a local user base of around 100 staff. The postholder is the senior technical escalation point for infrastructure incidents and is expected to take ownership of problems through to root cause.

Responsibilities

(These are specific to the client, we do not need specific technology matched experience)

Platforms and application delivery

• Administer the Nutanix virtualisation environment, including capacity, resource allocation, replication and alerting.
• Administer Windows Server 2022 and supported Linux services, with consistent patching and configuration baselines.
• Manage shared storage and NAS services for capacity, permissions and recoverability.
• Maintain and troubleshoot Parallels RAS published applications, RDSH session hosts and FSLogix profiles.

Microsoft 365, identity and security

• Administer Microsoft 365 E5, including Entra ID, Conditional Access, MFA, privileged access, Microsoft Defender and Purview DLP.
• Triage security alerts and manage vulnerability remediation, working with the managed security partner.
• Manage administrative, service and break‑glass accounts using least privilege and RBAC.
• Maintain endpoint security controls and PaperCut secure print through change control.

Backup, recovery and continuity

• Manage HYCU/Nutanix backups, including coverage, schedules, retention and failure alerting.
• Carry out and document regular file, database and virtual machine restore tests.
• Maintain the infrastructure disaster recovery runbook in line with the business continuity plan.

Networks and connectivity

• Support LAN, switching, wireless, DHCP, DNS and VLAN segmentation across all sites.
• Administer Cato SASE/SD‑WAN, including routing, secure remote access, policy and failover.
• Maintain current network diagrams, circuit inventory and monitoring thresholds.

Business applications and data

• Provide infrastructure support for the ERP, data warehouse, SSRS/Power BI Report Server, Exchequer/OneAdvanced and Power Platform.
• Support the availability, connectivity and backup of SQL Server, Oracle and MySQL platforms.
• Coordinate with suppliers including OneAdvanced, Nutanix, Microsoft, Parallels and Cato while keeping technical ownership.
• Support infrastructure readiness for upgrades, migrations and server decommissioning.

User support, service management and knowledge sharing

• Provide hands‑on support to local users, in person and remotely, including devices, accounts and access.
• Lead triage, root‑cause analysis and post‑incident reviews for priority incidents.
• Record incidents, problems, changes and knowledge in Halo ITSM, with material changes going through CAB.
• Produce and maintain architecture diagrams, build standards, procedures and known‑error articles.
• Share knowledge with and coach IT colleagues to build resilience within the team.

Experience Required

• Significant hands‑on experience in an Infrastructure role.
• Proven experience of on‑premise and cloud environments.
• Experience of supporting a multi‑site environment.
• A track record of improving the stability of an infrastructure environment and resolving recurring problems.
• Experience of supporting users directly alongside infrastructure responsibilities.

Skills Required

• Windows Server administration.
• Backup and disaster recovery, including restore testing.
• Enterprise networking, including DHCP, DNS, VLANs and SD‑WAN/SASE.
• Microsoft 365 security, including Entra ID, Conditional Access and Defender.
• Published application and desktop delivery (Parallels RAS, Citrix or RDS) and FSLogix.
• Clear documentation and structured troubleshooting.
• A calm and approachable manner when communicating with users at all levels.

Renumeration

• 28 days annual leave
• Buy / sell annual leave (option to buy or sell five additional days each year)
• Hybrid working arrangements
• Work from anywhere Work from anywhere policy up to 20 days per year
• Volunteering leave and Grandternity leave (2 weeks leave for new grandparents)
• Financial wellbeing
• Bonus Discretionary bonus scheme
• Pension 6% company contribution, minimum 5% employee contribution
• Workplace Nursery Scheme Salary sacrifice savings on eligible nursery fees
• Sustainable travel Cycle to work scheme and interest‑free season ticket loans
• Private medical AXA healthcare scheme, includes unlimited GP consultations
• Life assurance Up to 4x salary
• Enhanced sick pay Up to 6 weeks at full pay
• EAP Mental health and wellbeing support
• Car leasing Salary sacrifice scheme through Tusker
• Social Social events and more
• Discounts Employee discounts