Systems Administrator job description and duties
A systems administrator is responsible for the servers and shared services that people across an organisation rely on to do their work. The role combines routine care, such as patching and backups, with urgent problem-solving when something fails. In smaller organisations the same person may also look after the network and user support; in larger ones responsibilities are split by platform or service.
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Purpose of the role
The purpose is simple to state: shared systems should be available, secure and recoverable. Staff should be able to log in, reach their files and use business applications without thinking about the servers underneath. When something does go wrong, the administrator restores service quickly and makes the same failure less likely next time.
Daily duties
- Check monitoring dashboards, backup reports and overnight alerts.
- Resolve escalated tickets involving accounts, permissions, servers and applications.
- Create, change and disable user accounts and access rights.
- Watch disk space, memory and processor load on key servers.
- Review security alerts and logs for signs of trouble.
- Record changes and update documentation.
Periodic duties
Some responsibilities run on a cycle. Updates are applied to servers in planned windows. Backups are tested by restoring data. Accounts with administrator rights, and access to sensitive folders, are reviewed. Licences, warranties and support contracts are checked before they lapse. When the organisation adopts a new system, the administrator plans its servers, storage, security and backup arrangements.
Systems typically looked after
Depending on the organisation, the role covers directory services and authentication, file and print servers, email and collaboration platforms, database and application servers, virtualisation hosts, backup systems and cloud services. Many administrators also look after the monitoring platform that watches over all of these.
Working with others
The helpdesk passes on problems that need server access. Network administrators and engineers work closely with systems staff, because every service depends on the network. Developers and application owners rely on administrators for environments to deploy into. Outside the organisation, the role deals with software vendors, cloud providers and support contractors. In most organisations the role sits in the ICT unit, under the head of ICT or an infrastructure manager.
How performance is judged
A systems administrator is judged mainly on availability and recovery: how rarely services fail, how quickly they return when they do, and whether data is ever lost. Other measures include how current patching is, whether restores are tested, how well changes are controlled, and how users experience the support they receive.
Open adverts for this position
No open Systems Administrator advert matched when the jobs board was last checked. It is refreshed every morning.
Common questions
Is systems administration mostly reactive work?
Less than it looks from outside. Good administrators spend much of their time on preventive work, such as patching, monitoring and automation, which reduces the number of emergencies.
Do systems administrators need to be on call?
Often, especially where services run around the clock, as in hospitals, banks and providers. Adverts usually say when on-call or out-of-hours work is part of the role.
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