The hiring process is pretty long and drawn out with not often not hearing anything from HR even through email. Unfortunately HR is not present full time at the facility.
Overall there is 3 interviews, First is your written test, then a sit down interview with a 3-5 person interview, and last is a hands on test.
It is a long process so do not be discouraged, the pay and Benefits are worth it.
Also if you do get the job, they only seem to give you a weeks notice for your start date.