At the time every branch of the military wanted its own computer security force; eventually they were unified under the Joint Forces Cyber Command, which is under the Stategic Command (STRATCOM); the Strategic Command is the joint successor to the Strategic Air Command.
(The military is heavily into the word "Joint". I cannot possibly speculate as to why.)
Each branch has its own force, MARFORCYBER for the Marines and so on.
They are all based in Ft. Meade however Ft. Meade really isn't that big. I expect they just use Ft. Meade to receive snail mail, but if you look up its Zip Code at http://www.usps.com/ in bright red text the resulting page says "The Postal Service does not deliver mail to Ft. Meade" but then provides the Zip Code.
(At least it did last time I checked.)
Also at Ft. Meade and open to the public is the National Cryptological Museum. You can see stuff like a U-2 and a real Enigma machine there.
You can apply to work for These United States at http://www.usajobs.gov/
I watched some recruiting videos when I applied to the USAF Cyber Command; one of pointed out that cell phones are not permitted in secure areas because they have a maintenance mode that enables The Phone Company to listen in without your knowledge. Have A Nice Day.