Installation & configuration of various operating Systems & software. Perform regular security audits and take corrective action as required. These audits may include attempts to crack user passwords; maintenance of system logs of network activity in order to watch for attacks on network/system security; deletion or alteration of system-related files in user accounts; deletion of files or processes that are jeopardizing the security of a user account or of the system as a whole or which have resulted in degradation of system performance.