These are the IT guys that help you troubleshoot and fix problems with your computer. Also, in the corporate world they create user accounts that you log ito, as well as manage them by setting security permissions and what group your account belongs to.
Some of these people connect and setup routers and switches for businesses. They are also the ones in charge of e-mail and web servers, as well as the proxy/firewall (which is what blocks you from accessing parts of the Internet at work.)
People in this field are the ones that deal with the physical technological backbone and schematics of the company. Their jobs almost never involve creating any computer programs, but they are the ones that install and manage the programs on your computer at work. So if something breaks, you call them.
So, do you think this is more of a left-brain or right-brain career field?