I applied through an employee referral. The process took 1 day. I interviewed at Amgen (Thousand Oaks, CA) in May 2016
Interview
All-day interview; 1:1 meetings with group directors and senior managers. Skills test and group lunch and dinner. Overall, the interviews were mostly conversational. Interviewers wanted to know about my experience, how I may approach certain projects, reasons for leaving current job, etc. There were no trick questions or any designed to stump you.