I have been here at Hermosa for a few years now. Getting an interview means you have to submit a 30 minute screencast of you working. We only hire creative tech people so you pretty much have to have a working knowledge of your craft at an expert's level to even be considered for an interview. Then a 4 hr prove it session. You bring in all of your equipment and setup to prove it. 4 hours of scrutiny as a panel watches you work. The panel is your direct contact people for your skills.
My interview was just like this however smaller company at the time. The ownership is only looking for the top 1% of talent and only about 1% even make it to a prove it session. Once you are called back, you win your own station and get to move your setup temporarily into the newbie space for about a month. The rest is secretly awesome.