There is Aptitude test, Interview, and FGD at first. If you can through fgd test then you will continue to HR and User Interview. The question for aptitude test consists of basic electrical, mechanical, and, logic.

I submitted a general field operator/specialist application. I was invited for a phone interview 1 month later, at the end of the interview scheduled an in person interview in Houston which they proved flight and hotel. The 2 day interview consisted of about 30 people and was most in a group information session. The second day was the individual interviews. I was offered employment 3 weeks later.