Information Technology Infrastructure Manager in London

We are recruiting an IT Infrastructure Assistant Manager to join the IT Infrastructure function of a highly regulated financial services organisation based in the City of London. The role is responsible for the secure operation, resilience, and continuous improvement of core infrastructure services, with a strong emphasis on vulnerability management, patching, and secure operations. This is a hands-on 3rd line role, requiring deep technical expertise across Microsoft platforms, VMware, identity and access management, and security tooling within a banking or regulated environment.

Key Responsibilities

• Own and operate enterprise vulnerability and patch management processes across servers, virtualisation and endpoints.
• Act as 3rd line escalation for complex remediation issues, performing root cause analysis and driving permanent fixes.
• Work closely with Security Operations teams to assess, prioritise and remediate vulnerabilities in line with SLAs and risk policies.
• Plan and deliver patching via formal change and release governance.
• Design and enhance automated remediation using tools such as SCCM/ConfigMgr, Intune and PowerShell.
• Produce audit-ready evidence and compliance reporting.
• Design and support Windows Server environments (2016–2025), Active Directory, GPO, DNS, DHCP and PKI.
• Support Exchange (On-Prem & Online), Microsoft 365, Teams, SharePoint and OneDrive, including security integrations.
• Lead VMware estate management (vSphere 8, VCF, VVF, HCI, Aria), including HA, DRS, vMotion and lifecycle management.
• Implement Microsoft Security Baselines and CIS controls.
• Manage SSO/MFA, PKI/SSL, PAM (CyberArk) and endpoint security controls.
• Run enterprise vulnerability programmes using Tenable, Runecast, PatchMyPC.
• Maintain Disaster Recovery and Business Continuity plans and validate RTO/RPO through testing.
• Build automation using PowerShell to reduce manual effort.
• Operate monitoring platforms (SolarWinds or equivalent), capacity planning and proactive remediation.
• Provide 3rd line support, lead incident RCA, and deliver long-term fixes.
• Produce operational documentation, runbooks and change artefacts.
• Support Red Hat Linux in hybrid environments.
• Contribute to Azure and hybrid identity initiatives (Microsoft Entra).

Required Skills & Experience

• 5–8 years' experience in IT Infrastructure or Systems Engineering, ideally within banking or financial services.
• Strong hands-on experience with Microsoft Server, Active Directory, Group Policy, PKI.
• VMware vSphere 8 and related platforms.
• SCCM/ConfigMgr, Tenable, Runecast, PatchMyPC.
• PowerShell scripting and automation.
• Proven experience delivering vulnerability remediation and secure infrastructure operations.
• Strong troubleshooting, analytical and root cause analysis skills.
• Experience working within regulated, audit-driven environments.
• Excellent communication skills with technical and non-technical stakeholders.

Qualifications (Essential)

• ITIL Foundation
• Microsoft Certifications (MCSA, MCSE, Azure Administrator/Engineer)
• VMware Certifications (VCP, VCAP)

Desirable: Security+, CISSP or equivalent security certifications.

Working Arrangements & Benefits

• Hybrid working (minimum 2 days per week onsite)
• Home working equipment provided
• TOIL payable for out-of-hours support where required
• Discretionary bonus scheme
• Comprehensive benefits package including pension, private medical insurance, life assurance, training support, and enhanced leave

Right to Work: Applicants must hold an existing UK Right to Work. Sponsorship is not available.

CVs must not include current or expected salary. Salary expectations should be confirmed separately by email.

Interview process includes 3–4 stages, combining face-to-face and virtual interviews.