I have basically the same critiques as everyone else. I like #1 and #3, but think you could use a lot more shadow detail, particularly in the faces. Also, there's a lot of falloff in the bottom of the frame on #3.
However, I don't think you went in the right direction for a corporate shot. These photos make the guys look shady and evil. (Not a comment on the guy's actual personality) These photos would not make me think that the guys are good guys to work with, are more likely to try and take over my company.