I have been working at alliantgroup, LP full-time (More than a year)
Almost a true meritocracy and much closer than most places to getting it right. If you are a type-A personality and a workaholic who doesn't mind also wasting time when more senior staff think it's time to hang out you would probably do well there.
There's a bit of a boy's club and while they invest a lot in the employees sometimes that means they can't admit when they need to let go of some that aren't working out and instead will get of newer talent.
I applied through an employee referral. The process took 2 weeks. I interviewed at alliantgroup, LP (Houston, TX).
There was a phone screen which lasted maybe fifteen minutes at the most. There was then a follow up interview with someone in HR that lasted about twenty-five minutes. There was then an Associate event that had about sixteen of us in a room where we met with senior level people while being taken out of the room one by one to have an interview with two of the senior people. There were three conference rooms going on at once. All people were extremely friendly and welcoming. The interviewers asked good questions and were attentive.