You're assuming this is all being instituted by some sexist man(men) running the show who's only hiring attractive females and has instituted a sexist and oppressive workplace. What if it's just a laid-back and casual/uncorporate type environment and they have a lot of female employees who are stereotypical sorority girls? What if the women are the ones picking out the shirts and posting the pictures with the matchy outfits and heart emoticons?

I'm an older engineer now who does a lot of hiring. I look at FB pages of potential hires, and I have a few teenaged and college-aged female family members on my friend's list. I've seen 1000's of pictures just like the ones you linked proudly shared for the entire world on the FB pages of female applicants. Often they'll be in a bikini and everyone has a cup or bottle of beer in their hand. Or a bong. I can't help but notice that almost all of the "look at my group of friends and I, aren't we sexy?" pictures I see are being taken and posted by women.

I'm not saying you should want to work there, just suggesting that you're seeing sexism and a hostile work environment where they may not be one. In fact, the female employees at that company may love their jobs because it's laid back and they're allowed to act at work just like they did in college and would in their private lives.

You mentioned Oil and Gas btw, so I can't help but wonder if this isn't a Gulf Coast company. Gender roles and what's socially acceptable here are really weird, and as a guy who grew up in the Midwest I find some of it really odd and disappointing. Funny example, the PTA at my daughter's school (this is Texas where this stuff is a bit weird) had a "movie night" where like 15 PTA members (all women, mostly in their 30's and 40's) went to see 50 Shades of Grey together. Many dressed up in their "sexy" clothes like they were going to a club or something, then they proudly posed and took pictures together which were posted on the local PTA facebook group. Lots of additional comments about how they went out drinking and whatnot afterwards well. This was all commented on as a happy and fun thing, and "how great the ladies could get out and unwind together." I couldn't help but think that if a bunch of men in the PTA had gotten together and gone out to Hooter and posted pictures it would've been anarchy.