Senior Systems Administrator

Company: Optimal Ltd
Apply for the Senior Systems Administrator
Location: Gloucester
Job Description:

System Administrator/Head of IT | Infrastructure, Networks & End-User Support | Linux & Microsoft

Please make sure you read the following details carefully before making any applications.

?Location:Cheltenham, Gloucestershire (Onsite)

Package:£35,000 – £40,000 + 10% Bonus + Benefits

Eligibility:Must be able to obtain and maintain UK Government SC clearance -ILR or British Passport

?? Please only apply if you have commercial experience with all of the following ??

Managing internal IT systems across desktop, server, network and cloud environments

Administering both Linux and Microsoft operating systems

Using network and systems management tools

Implementing and maintaining strong security controls across an IT estate

Installing, configuring and troubleshooting hardware, operating systems, networks and applications

Producing clear, accurate technical documentation and procedures

The Role

This is a hands-on System Administrator position in a well-established technical organisation that values innovation, quality and team culture. You’ll own internal IT operations end-to-end in an onsite environment, managing infrastructure and security while supporting both internal staff and client-facing technical remediation work.

Must-Haves

Experience managing internal IT systems (end-user, server, network and cloud)

Hands-on administration of Linux and Microsoft environments

Knowledge of network security and firewall technologies

Experience with ticketing systems and knowledge-base tools

Experience with MDM platforms

Ability to install, configure and troubleshoot hardware and software

Excellent communication skills and proactive, service-focused approach

What You’ll Be Doing

Manage and support internal IT systems, monitor health/stability, respond to alerts

Implement security controls and maintain compliance with internal standards

Assist clients in implementing technical fixes following assessments

Produce documentation, procedures and supporting materials

Support colleagues with day-to-day IT requirements

Contribute to continuous improvement initiatives

Hands-On Experience With

Office, desktop, server and network administration

Linux and Microsoft operating systems

Infrastructure-as-a-service cloud platforms

Network security and firewall technologies xwzovoh

VPN / remote access solutions

Ticketing and knowledge-base systems

Mobile device management tooling

Hardware, operating system and network configuration

Bonus Experience

Exposure to delivering technical remediation for clients

Experience with ISO-aligned processes (e.g. ISO27001)

Microsoft desktop or cloud certifications

Experience supporting or mentoring junior team members

Important Notes

This is a fully onsite role in Cheltenham

Candidates must be eligible for and capable of holding UK Government Security Clearance (SC)

A hands-on role with active ownership of internal IT systems

If you match the above criteria and would like a confidential discussion about the role, please get in touch.

Posted: April 2nd, 2026