Try turning off the wirless (Settings->Wireless & Networks-> Wifi), wait for about five seconds then turn it back on. Let it find your wireless connect at work, and see if works. If not, delete your work's wireless profile and add it again. Maybe there is something you missed in the intial connection.
At my job we have two networks and unsecured "guest" on and a 801.x secured "restricted" one. I think to get the restricted working it took me a few tries.