System Engineer - Infrastructure in London

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

If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.