Well in F3 I used to just go to Vault 101 and Reverse/Pickpocket Enclave Armour and Officer Gear onto People, the Overseer was in a suit because he was the President
But in New Vegas there may be no armour so...
I would and will still try and create my own and make some plausible story in my head as I will be continuing the story of my character from F3, Colonel Sutler, head of the Army who has sent the last 200 saves going around Enclave camps with the mesmetron making them friendly.