I've been in telecom and information systems for the last 15 years. Both are heavily male dominated al, with a heavy my ex military presence. Even many of the women I've worked with are strong type-A personality. While I have lots of hair on my arms, it's very light colored. This has gotten me called "queer" & "sissy boy" because it wasn't noticeable from across the room. I've been harassed for wearing red & salmon colored button-down shirts to work, instead of blue, black, & other "manly" colors. My last career advancement didn't come until I grew a beard.
While you'll never find me wearing a skirt & heels to the office, it doesn't prevent me from dressing as I please at home.