Senior IT Infrastructure & Systems Manager

Salary: £58,000 - 98,000 per year

Requirements:

• We are looking for an experienced Senior IT Infrastructure Manager with at least 7 to 10 years of experience.
• We need strong experience in enterprise IT infrastructure and systems administration.
• We require experience working with financial services, banking, trading, or treasury environments.
• We need proven experience managing mission-critical infrastructure and applications.
• We require experience operating in regulated and security-focused environments.
• We need strong technical expertise across Windows and Linux server environments, VMware virtualized infrastructure, Veeam backup and disaster recovery, Microsoft 365, endpoint security, and network administration.
• We require experience supporting enterprise applications and financial systems, including trading and treasury platforms.
• We need familiarity with cybersecurity tools and practices, including vulnerability management, SIEM, and SSL/TLS certificate lifecycle management.
• We require experience supporting VIP stakeholders.
• We need someone able to work in a hybrid arrangement with 3 days in our Central London office.

Responsibilities:

• We oversee, manage, and continuously improve our IT infrastructure, enterprise systems, network environment, and end-user computing services.
• We ensure the availability, security, performance, and resilience of critical business systems.
• We lead technical teams and support key stakeholders across the organization.
• We administer, maintain, and optimize Windows and Linux server environments.
• We manage VMware virtualized infrastructure.
• We oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication, Veeam ONE, and Veeam Recovery Orchestrator.
• We administer endpoint security and encryption solutions.
• We support endpoint DLP, SIEM, and security monitoring tools.
• We manage patching processes using ManageEngine Patch Manager Plus.
• We support Microsoft 365 services and related cloud technologies.
• We monitor system performance, capacity, availability, and infrastructure health.
• We ensure compliance with IT governance, security policies, and operational standards.
• We provide advanced desktop, laptop, printer, mobile device, and branch office IT support.
• We deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems.
• We manage OS deployment, imaging, image creation, maintenance, and software packaging.
• We administer Active Directory, Group Policy Objects, user provisioning, and NTFS permissions.
• We support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint.
• We resolve technical incidents and service requests in line with agreed SLAs.
• We support and administer business-critical applications and file synchronization and replication solutions.
• We configure and support Cisco switches and routers.
• We administer FortiGate firewall environments.
• We monitor network performance, availability, and security posture.
• We support vulnerability management, security monitoring, and log analysis tools.
• We perform SSL/TLS certificate lifecycle management, including CSRs, certificate chains, and private keys.
• We ensure adherence to cybersecurity policies, standards, and regulatory requirements.
• We support physical access control systems.
• We develop, maintain, and enforce IT policies, standards, and operational procedures.
• We produce system architecture diagrams, technical documentation, SOPs, and performance reports.
• We identify and drive opportunities for automation and service improvement.
• We support technology planning, infrastructure modernization, and transformation initiatives.

Technologies:

• Active Directory
• Cloud
• Cisco
• Firewall
• FortiGate
• Support
• Linux
• Microsoft 365
• Mobile
• Network
• Security
• SharePoint
• VMware
• Veeam
• Windows
• Office 365
• DevOps
• Hardware
• LAN
• Nexus
• Splunk
• Swift
• TCP/IP
• iOS

More:

We are a London-based organization offering a senior IT infrastructure and systems role with some remote working possible. This is a permanent, full-time position with a salary range of 55,000 to 60,000. The role sits within a complex enterprise environment covering financial, trading, and treasury systems, and it is a hybrid position with 3 days in our Central London office.

last updated 36 week of 2026