Introduction: I've been in IT for roughly 16 years, mostly as a network administrator.
Some of the services performed are the following:
* user support ("helpdesk") services either by telephone, e-mail, remote computer access or on-site
* installation of software upgrades and operating system security patches
* troubleshooting and repair of hardware and software when problems arise
* unbiased advice regarding the purchase of new equipment and/or software applications
* server, firewall, and network infrastructure monitoring from operational and security standpoints