Since your company allows carrying a sidearm and you have to wear a suit, there is no reason to go with a crotch or underwear girdle holster and carry subcaliber miniature gun. A proper IWB or even OWB holster can conceal most full size handgun. Like another poster said, the USSS, FBI, and various federal agents do it all the time.
When I do have to wear a suit to business or social functions, I carry one of my Smith & Wesson K frame revolvers in a 5shot leather or Lobo gunleather OWB holsters. For whatever reason, a revolver is easier to carry under a fitted jacket than a semi auto of the same size. I've carried K frames with 2", 2.5" and 3" and have never been noticed. Buy your coat jacket one size bigger and you will be fine.
A friend of mine who used to work in a very gun UNFRIENDLY/PROHIBITIVE environment carried a full size 1911 in a Milt Sparks Summer Special everyday for many years. His job required wearing a sport coat or suit jacket so concealment was not an issue for him.
