1st, never delete Brickbreaker. There is no way to get it back again. The Application loader will not let you add it back, and nobody on the web has Brickbreaker.alx available for download.
Brickbreaker is one of the simple applications that comes with your BlackBerry. It is easy to remove (via Application Loader) and easy to add. Reload the handheld OS to your PC and then you can reload Brickbreaker.
2nd, never let your work BES touch your device. Once they make "security" changes to the ROM, there is no way to get rid of them. Wiping the BB has no affect.
More like never connect a personal BlackBerry to a corporate environment. Did you get permission to do this? At some companies, it is against written policy to connect personal devices to the corporate network. Search for "Remove IT Policy" on how to clean up this mistake.
JL_CMDER did exactly what it was supposed to do. It wiped the applications and OS from the BlackBerry.
Now you have to reload it.
You should definitely check out BlackBerry FAQ - BlackBerryFAQ
for more basic information on your BlackBerry before making blanket statements...