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.

Apply