System Engineer

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 routers & 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.