We are seeking a skilled Linux Engineer / Linux Systems Administrator to take ownership of our client's large scale Linux environment consisting of approximately 100 servers. This role will focus on Business-as-Usual (BAU) operations, maintenance, stability and performance, while also contributing to an ongoing infrastructure modernisation programme. This is an excellent opportunity for a technically strong Linux professional who enjoys both operational responsibility and forward-looking project work. Key Responsibilities BAU & Operational Support \* Administer, monitor, and maintain circa 100 Linux servers across production and non-production environments \* Perform system patching, upgrades and security hardening \* Manage user access, permissions and authentication services \* Troubleshoot performance issues, outages and system alerts \* Maintain high availability, reliability and up time standards \* Manage backups, restores and disaster recovery processes Modernisation & Project Work \* Contribute to infrastructure improvement and automation initiatives \* Support migration, consolidation or upgrade projects \* Assist with cloud, virtualisation or containerisation initiatives where applicable \* Identify opportunities for efficiency, performance and cost optimisation Documentation & Governance \* Maintain clear technical documentation and runbooks \* Follow change management and incident management processes \* Work collaboratively with network, security and application teams Required Skills & Experience \* Strong hands-on experience administering Linux environments (e.g., Ubuntu, CentOS, Red Hat, Debian or similar) \* Solid understanding of server hardware, storage and virtualisation platforms \* Experience with patch management and security best practices \* Proficiency with shell scripting (Bash or similar) \* Knowledge of monitoring and logging tools \* Experience supporting large-scale server estates Desirable \* Exposure to cloud platforms (AWS, Azure, GCP) \* Experience with automation tools (Ansible, Puppet, Chef, Terraform) \* Knowledge of containers (Docker, Kubernetes) \* Understanding of networking fundamentals and firewalls \* ITIL or relevant Linux certifications Personal Attributes \* Strong problem-solving and analytical skills \* Ability to prioritise workload in a fast-paced environment \* Clear communication and documentation abilities \* Proactive and improvement-focused mindset What's on Offer \* Opportunity to influence and shape infrastructure modernisation \* Exposure to both operational stability and transformation projects \* Supportive technical environment with room for growth \* Competitive salary and benefits package At Gleeson Recruitment Group, we embrace inclusivity and welcome applicants of all backgrounds, experiences, and abilities. We are proud to be a disability confident employer. By applying you will be registered as a candidate with Gleeson Recruitment Limited. Our Privacy Policy is available on our website and explains how we will use your data