Systems administrators develop, control, maintain and support the optimal performance and security of information technology systems
(a)     Tasks include -
maintaining and administering computer networks and related computing environments including computer hardware, systems software, applications software and all configurations;
recommending changes to improve systems and network configurations, and determining hardware or software requirements related to such changes;
diagnosing hardware and software problems;
performing data backups and disaster recovery operations;
operating master consoles to monitor the performance of computer systems and networks, and to coordinate computer network access and use.