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 lifecycle 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.