Very long and in depth online testing multiple rounds of interviews consecutively HR screening to phone interview to in person interview (multiple managers from different departments) to online testing and then thorough background check, health physical and drug screening

There was a two part interview. The first part was just general interview questions, if they liked you then you were invited in to take an assessment and then asked to come to an on-site interview. (I only made it to the first round of the interview)