Senior IT Infrastructure & Systems Manager

• Job Reference: NJ0590
• Date Posted: 3 November 2026
• Recruiter: Nexus Jobs Limited
  
• Location: London
• Remote Working: Some remote working possible
• Salary: 55,000 to 60,000
• Sector: I.T. & Communications
• Job Type: Permanent
• Work Hours: Full Time
• Contact: Jas Gujral
• Email:
  
• Telephone:
  

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Job Description

Senior IT Infrastructure & Systems Manager

We are seeking an experienced and highly motivated Senior IT Infrastructure Manager with at least 7 to 10 years experience to oversee, manage, and continuously improve the organization’s IT infrastructure, enterprise systems, network environment, and end-user computing services.

The successful candidate will ensure the availability, security, performance, and resilience of critical business systems while leading technical teams and supporting key stakeholders across the organization.

This role requires a strong blend of technical expertise, leadership capability, operational excellence, and stakeholder management skills, within a complex enterprise environment that includes financial, trading, and treasury systems.

Infrastructure & Systems Management

Administer, maintain, and optimize Windows and Linux server environments.

Manage VMware virtualized infrastructure (vSphere 8 and above).

Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication.

Manage Veeam ONE monitoring and Veeam Recovery Orchestrator (VRO) environments.

Administer endpoint security and encryption solutions, including Symantec Endpoint Protection (SEP) and Symantec Endpoint Encryption (SEE).

Support endpoint DLP, SIEM, and security monitoring tools (e.g., Splunk, Tenable).

Manage patching processes using ManageEngine Patch Manager Plus.

Support Microsoft 365 services and related cloud technologies.

In depth understanding of Cyber security

Monitor system performance, capacity, availability, and infrastructure health.

Ensure compliance with IT governance, security policies, and operational standards.

End-User Computing Support

Provide advanced desktop, laptop, printer, Mobile device (iOS) and branch office IT support.

Deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems.

Manage OS deployment, imaging, image creation, maintenance, and software packaging.

Administer Active Directory (AD), Group Policy Objects (GPOs) and user provisioning and NTFS permissions.

Support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint.

Resolve technical incidents and service requests in line with agreed SLAs.

Enterprise Applications & Financial Systems Support

Support and administer business-critical applications, including:

Bloomberg FXT and Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access (SAA), 1AML, SIBS, GFMS, COP

Support enterprise file synchronization and replication solutions (e.g., Syncovery, other SFTP).

Networking

Configure and support Cisco switches and routers.

Administer FortiGate firewall environments.

Strong network fundamentals: DNS, DHCP, TCP/IP, LAN/WAN, Routing and connectivity troubleshooting.

Monitor network performance, availability, and security posture.

Security & Endpoint Management

Support vulnerability management using tools such as Tenable.

Manage security monitoring and log analysis tools (e.g., Splunk).

Perform SSL/TLS certificate lifecycle management using OpenSSL.

Create and manage CSRs, certificate chains, and private keys.

Ensure adherence to cybersecurity policies, standards, and regulatory requirements.

Support physical access control systems (e.g., Paxton)

Governance, Documentation & Process Improvement

Develop, maintain, and enforce IT policies, standards, and operational procedures.

Produce system architecture diagrams, technical documentation, SOP’s, and performance reports.

Identify and drive opportunities for automation and service improvement.

Support technology planning, infrastructure modernization, and transformation initiatives.

Operating Systems

Windows 11

Windows Server 2019/2022 (or equivalent enterprise environments)

Red Hat Linux

Infrastructure & Virtualization

VMware vSphere / vCenter (v8.0.3 and above)

Veeam Backup & Replication

Veeam ONE, VRO

Microsoft Office 365

ManageEngine Patch Manager Plus

SAAS solutions

SQL Server

Security

Symantec Endpoint Protection (SEP)

Symantec Endpoint Encryption (SEE)

SentinelOne – EDR/ XDR

Endpoint DLP solutions

Firewall administration

Vulnerability management tools (e.g., Tenable)

SIEM tools (e.g., Splunk)

Networking

Cisco Switches and Routers

FortiGate Firewalls

LAN/WAN networking and routing

Hardware & Storage

Dell PowerEdge Servers

Dell PowerVault SAN Storage

Technical Competencies

Data analysis and operational reporting

Desktop and laptop support

Infrastructure monitoring and performance management

Certificate lifecycle management (SSL/TLS)

Windows imaging and deployment, GPO, NTFS

PowerShell scripting

SQL Server administration

Understanding of software development lifecycle (SDLC) and deployment processes

Architecture review and systems optimization

Asset management

7+ years of experience in enterprise IT infrastructure and systems administration.

Experience within financial services, banking, trading, or treasury environments.

Proven experience managing mission-critical infrastructure and applications.

Experience operating within regulated and security-focused environments.

Able to provide support to VIP stakeholders

This is a hybrid role 3 days in the office in Central London.

Salary for this role will be in the range 55K - 60K.

Do send your CV to us in Word format along with your salary and availability.