I applied through university. The process took 1 week. I interviewed at Libety Oilfield Services (Henderson, CO) in Mar 2021
Interview
Interviewed them in person. They ask easier questions than expected to gauge your confidence in the basics, and then curveball a difficult / impossible question to see how you handle not knowing something.
Interview questions [1]
Question 1
What is the overall voltage / current output if I put two batteries in series? How about parallel?