Yeap just as Memphis says above Academy grads do all kinds of things after they either leave or retire from service. I have classmates and friends that are doing all kinds of things. Heck we had one classmate join the Peace Corps when they left active duty. I have friends that work for the FBI, CIA, Secret Service, defense contractors, government employees, lawyers, politicians, salesmen, doctors, firemen, paramedics, teachers, etc. Any profession you can think of I am sure there is an academy grad tackling it. As far as CPA goes, I would probably think economics or quantitative economics would be the best path as far as USNA majors. But, with that said and as 64 mentions above, more schooling will be required and could even be accomplished while on active duty if the opportunity arises.