Linux System Administrator

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