Job Reference: NJ0590Date Posted: 17 August 2026Recruiter: Nexus Jobs LimitedLocation: LondonRemote Working: Some remote working possibleSalary: 55,000 to 60,000Sector: I.T. & CommunicationsJob Type: PermanentWork Hours: Full TimeContact: Jas GujralEmail: #####: 020 7488 6900Apply for this job nowJob DescriptionSenior IT Infrastructure & Systems ManagerWe 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 ManagementAdminister, 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 securityMonitor system performance, capacity, availability, and infrastructure health. Ensure compliance with IT governance, security policies, and operational standards. End-User Computing SupportProvide 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 SupportSupport 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). NetworkingConfigure 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 ManagementSupport 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 ImprovementDevelop, 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 SystemsWindows 11 Windows Server 2019/2022 (or equivalent enterprise environments) Red Hat Linux Infrastructure & VirtualizationVMware vSphere / vCenter (v8.0.3 and above) Veeam Backup & Replication Veeam ONE, VROMicrosoft Office 365 ManageEngine Patch Manager Plus SAAS solutionsSQL ServerSecuritySymantec Endpoint Protection (SEP) Symantec Endpoint Encryption (SEE) SentinelOne – EDR/ XDREndpoint DLP solutions Firewall administration Vulnerability management tools (e.g., Tenable) SIEM tools (e.g., Splunk) NetworkingCisco Switches and Routers FortiGate Firewalls LAN/WAN networking and routing Hardware & StorageDell PowerEdge Servers Dell PowerVault SAN Storage Technical CompetenciesData analysis and operational reporting Desktop and laptop support Infrastructure monitoring and performance management Certificate lifecycle management (SSL/TLS) Windows imaging and deployment, GPO, NTFSPowerShell scriptingSQL Server administration Understanding of software development lifecycle (SDLC) and deployment processes Architecture review and systems optimization Asset management7+ 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 stakeholdersThis 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.