Job Title: IT Infrastructure Assistant Manager (12-Month FTC)

Location: City of London (Hybrid - 2 days onsite per week)

Contract Type: 12-month Fixed Term Contract (with potential extension or conversion to permanent)

Salary: £65,000 - £75,000 per annum (dependent on experience)

Working Hours: 35 hours per week (shift pattern between 7:30am - 6:30pm)

Notice Period: Immediate or short notice preferred

Client: Japanese Investment Bank

About the Role

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

Vulnerability & Patch Management

• 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.

Microsoft Server & Collaboration Platforms

• 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.

Virtualisation & Data Centre

• Lead VMware estate management (vSphere 8, VCF, VVF, HCI, Aria), including HA, DRS, vMotion and life cycle management.

Security, Identity & Compliance

• 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.

Resilience & Continuity

• Maintain Disaster Recovery and Business Continuity plans and validate RTO/RPO through testing.

Automation, Monitoring & Operations

• 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.

Hybrid & Cloud Integration

• 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
• Exchange, Microsoft 365, Azure/hybrid identity
• 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

Important Information

• 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.