[A Balrog of Morgoth]

None come to mind , right off the top of my head.

Active duty military, maybe.

[NormsRevenge]

I guess one could call the military a business, it is a profession, for sure, and a proud one. ;-)

Kicking arse and taking names is as old as the hills.

[who_would_fardels_bear]

I remember stories of illegal aliens being found in the military and allowed to become citizens once they finished out their tour of duty.

So I think all bases are covered.

[ARealMothersSonForever]

Any foreign national, resident alien, and non-resident alien that is not otherwise prohibited may serve in the United States armed forces. "If you are a member of the U.S. Armed Forces and are interested in becoming a U.S. citizen, you may be eligible to apply for citizenship under special provisions provided for in the Immigration and Nationality Act (INA). Generally, service in the U.S. Armed Forces means service in one of the following branches: Army Navy Marine Corps Air Force Coast Guard Certain Reserve components of the National Guard Selected Reserve of the Ready Reserve Recent changes in the relevant sections of the INA (Sections 328 and 329) make it easier for qualified military personnel to become U.S. citizens if they choose to file a naturalization application." http://uscis.gov/graphics/services/natz/MilitaryBrochurev7.pdf#search='citizenship%20requirements%20to%20serve%20in%20the%20US%20military'

[CAWats]

Active duty military, maybe.

Wrong. There are illegals (18,000) in the military.