Y. Zhou,
First, Welcome
Second, most people that wear BA (LEO's, SWAT, Military) will always carry in some type of tactical holster or OWB. Unless you have the BA that has the side free (no insert panels) then you could carry there IWB I would guess.
Other than that, you would most likely have to go with off body carry or pocket/vest.
Good luck in your endeaver and again, welcome
.
Wayne