Job Title: Senior Systems Administrator - Windowns & Linux 
Location: Cambridge– 2 days
Employment Type: Full-Time | Permanent
 Salary: 55-65K + Benefits

We’re hiring on behalf of a cutting-edge tech-driven client in the connectivity sector who is seeking a seasoned Widowns expert with a knoweldge of Linux. Are you an experienced Senior Systems Administrator looking for your next challenge? Our client, a leading IT solutions provider, is seeking a highly skilled professional to take ownership of their core infrastructure and play a key role in maintaining and improving business-critical systems.
What you’ll be doing:

• Managing and supporting Windows Server environments (AD, Group Policy, DNS, DHCP, Exchange/365).
• Administering and maintaining Linux systems across production and test environments.
• Overseeing networking infrastructure (firewalls, switches, routing, VPNs, VLANs).
• Implementing and monitoring security best practices across systems and networks.
• Troubleshooting and resolving complex technical issues across multi-platform environments.
• Working closely with project teams to deliver upgrades, migrations, and new deployments.
• Producing and maintaining technical documentation for systems and processes.

What we’re looking for:

• Proven experience as a Systems Administrator / Infrastructure Engineer at senior level.
• Strong hands-on expertise with Windows Server (2016/2019/2022) and Active Directory.
• Solid knowledge of Linux systems administration (e.g., Ubuntu, CentOS, RedHat).
• Strong networking skills (TCP/IP, routing, switching, firewalls, VPNs, VLANs).
• Experience with virtualisation (VMware/Hyper-V) and cloud platforms (Azure or AWS a plus).
• Familiarity with backup solutions, monitoring tools, and scripting/automation (PowerShell, Bash).
• Excellent problem-solving skills and ability to work both independently and in a team.