System Administrator Job Description - Server and Network Administration

The System Administrator role is responsible for ensuring the stability, integrity and efficient operation of the organisation's IT systems. Candidates with a background in systems maintenance, network support and infrastructure management who can work methodically and respond to incidents should apply.

System Administrator Job Profile

The System Administrator provides day to day administration of servers, networking components and core IT services to support business operations. The role focuses on maintaining system availability, applying updates, performing backups and ensuring security and compliance within the IT environment.

This position suits individuals with solid technical skills, practical experience in systems support and the ability to document processes and communicate with technical and non-technical stakeholders.

System Administrator Job Description

The System Administrator will monitor system performance, apply patches and updates, manage user accounts and maintain data protection routines. Work is carried out within defined procedures and often involves prioritising incidents, coordinating with colleagues and escalating complex issues when necessary.

Regular tasks include capacity monitoring, routine maintenance, incident response and contributing to infrastructure change activities. The role requires accurate documentation, adherence to security policies and participation in after hours rota or on call duties when required.

Expectations include proactive problem solving, continuous improvement of system reliability and clear communication of technical matters to stakeholders. The post holder will also assist in implementing upgrades and small-scale projects to improve operational efficiency.

System Administrator: Duties and Responsibilities

• Install, configure and maintain server operating systems and core infrastructure components.
• Manage user accounts, permissions and access controls in line with security policies.
• Monitor system performance and resource utilisation to identify potential issues.
• Apply patches, updates and security fixes to servers and critical systems promptly.
• Perform regular backups and verify restore procedures to ensure data integrity.
• Respond to and resolve incidents, diagnose faults and implement corrective actions.
• Maintain system documentation, run books and configuration records for audit readiness.
• Implement and maintain security hardening measures and vulnerability remediation.
• Support network connectivity diagnostics and collaborate with network teams as needed.
• Participate in scheduled maintenance, upgrades and change control processes.
• Automate routine tasks through scripting and standard operating procedures where appropriate.
• Assist in capacity planning and resource forecasting to support business requirements.
• Provide technical support and guidance to end users and junior technical staff.
• Contribute to incident reviews and continuous improvement activities following outages.

System Administrator: Requirements and Qualifications

• Bachelor's degree or equivalent qualification in computing, information technology or related field preferred.
• Proven experience in systems administration, server management and IT operations.
• Practical knowledge of server operating systems, virtualisation concepts and storage management.
• Understanding of network fundamentals including TCP/IP, DNS and routing principles.
• Experience with backup, recovery processes and disaster recovery planning.
• Familiarity with security best practice, access control and patch management procedures.
• Ability to write basic scripts to automate tasks and manage repetitive processes.
• Strong analytical and troubleshooting skills with attention to detail.
• Good documentation skills and the ability to produce clear technical guides.
• Effective communication skills and the ability to work with non-technical stakeholders.
• Ability to prioritise workload, work independently and as part of a team.
• Willingness to participate in on call rota and out of hours maintenance as required.