IT System Engineer - (Patch Management)
Location: London - E16, UK (Hybrid - Office, Customer Sites & Remote)
Employment Type: Full-Time
Reports To: Lead System Engineer

Role Overview
We are seeking a skilled and proactive IT System Engineer to join our London-based infrastructure team. The successful candidate will be responsible for the delivery of patch management services and the hands-on installation of updates, upgrades, patches, and hotfixes across enterprise environments.
This role is both customer-facing and internally focused, requiring work at our London office, remote support, and on-site visits to Network Rail & TfL customer locations across Greater London and surrounding areas.
The position requires strong technical capability, excellent documentation skills, and a professional approach when operating within client environments.

Key Responsibilities
Patch & Update Management

• Plan, test, schedule and deploy patches, updates, service packs, upgrades, and hotfixes.
• Manage structured patch cycles (monthly, emergency, zero-day response).
• Perform pre-deployment testing and post-implementation testing & validation.
• Maintain patch compliance reporting and remediation tracking.
• Ensure minimal disruption to production systems.
  OS Infrastructure
• Updates to various Linux distributions, Ubuntu, Debian, Red Hat etc.
• Updates to Windows Server (2016/2019/2022) & Windows 10/11 environments.
• Configure and administer WSUS.
  Network & Security Infrastructure
• Deploy firmware updates and patches for:
• Cisco routers and switches
• Cisco firewalls
• Juniper firewalls
• Perform configuration backups and validation before changes.
• Assist with vulnerability remediation and security audits.
  Virtualisation
• Manage patching and lifecycle updates for VMware environments.
• Maintain and upgrade VMware ESXi hosts and vCenter.
• Ensure VM availability during maintenance cycles.
  Customer Engagement
• Deliver on-site patching and maintenance at customer locations.
• Provide clear communication before, during, and after maintenance windows.
• Produce change documentation and implementation reports.
• Work within ITIL change control processes.
  Required Skills & Experience
  Essential
• 5+ years’ experience in infrastructure or systems engineering roles.
• Experience delivering structured patch management processes.
• Knowledge of change management and maintenance windows.
• Excellent troubleshooting and root-cause analysis skills.
• Strong hands-on experience with some, or all of the following:
• Windows Server & Windows Workstation environments
• Linux Operating Systems
• WSUS administration
• Cisco rout ers & switches
• Cisco and Juniper firewalls
• VMware vSphere ( ESXi, vCenter, vLCM)
• HPE & Dell server firmware
  Desirable
• Familiarity with backup solutions.
• Exposure to automation (PowerShell scripting).
• ITIL Foundation certification.
• Vendor certifications (Microsoft, Cisco, VMware, Juniper).
• Experience working within Network Rail or Transport for London industry sectors.

Personal Attributes

• Professional and customer focused.
• Highly organised with strong documentation skills.
• Comfortable working out-of-hours during maintenance windows.
• Strong communication skills (written and verbal).

Working Conditions

• Hybrid working model (London office, remote, and customer sites).
• Occasional evening or night work during planned maintenance windows.
• Travel within Greater London and surrounding areas.

What We Offer

• Competitive London-based salary.
• Company pension scheme.
• 26 days Holiday plus Bank Holidays
• Employee portal
• Professional development and certification support.
• Exposure to diverse enterprise customer environments.
• Opportunity to work across multi-vendor infrastructure technologies.