Many, many years ago I graduated in ChemE from Washington University in St. Louis, not too far from you. Even back then, there were quite a few women in the engineering program, so I don't think it's quite as "male-dominated" as you perceive. Based on the newsletters I get, they still have quite a few women in the program. It's worth checking out.

Other than invitations to AIChE (professional organization) meetings that were postcards with women in bikinis, and suggestive calendars from Ridgid hanging everywhere--all way back in the late 70s/early 80s--I never experienced any problems.