Global Systems Administrator - 24/7 On-Call & Automation

Astreya; Greater London; On-site; GBP 45,000 - 65,000; Full time

Job summary

Astreya in London, United Kingdom, seeks a System Administrator to support and maintain large-scale systems for building management and physical security operations. The role is ticket-based, with procedural work through tickets to resolution.

Responsibilities include monitoring ticket queues and communications channels, managing systems and infrastructure, logging ticket metadata, and coordinating with internal and third-party teams. On-call and after-hours support are required.

Qualifications

• Bachelor’s degree in a related field with 2–5 years’ experience or equivalent.
• Strong internal/external relationship building and judgment within procedures.
• Experience building and managing servers; strong networking troubleshooting.
• Familiar with ticket systems and following processes; good writing skills.
• Windows Server (AZ-800/801) certification a plus; Linux/Windows patching
• Remote access via SSH/RDP; VDI experience with Horizon/Citrix is beneficial.
• Automation scripting experience is preferred; Linux certs a plus.

Responsibilities

• Monitor ticket queue and IM channels.
• Monitor and participate in managing systems and infrastructure.
• Accurately record metadata related to tickets in internal tools.
• Resolve troubleshooting tickets with internal and third-party teams.
• Maintain professional communication with third parties per vendor code of conduct.
• Provide out-of-hours support for scheduled upgrades.
• Provide 24/7 on-call support for critical outages.
• Other duties as required.

Skills

Bachelor’s degree

Server admin

Networking

Troubleshooting

Ticket systems

Communication

AZ-800/801

Windows/Linux

Remote access

VDI Horizon/Citrix

Automation scripting

Linux cert

3rd party coordination

Education

Bachelor’s degree

Tools

Horizon/Citrix

Job description

Astreya in London, United Kingdom, seeks a System Administrator to support and maintain large-scale systems for building management and physical security operations. The role is ticket-based, with procedural work through tickets to resolution.

Responsibilities include monitoring ticket queues and communications channels, managing systems and infrastructure, logging ticket metadata, and coordinating with internal and third-party teams. On-call and after-hours support are required.