Step 1: phone interview with recruiter, after being referred by another employee. step 2: in-person interview, small group - 2 interviewees x 2 interviewers (broad introductions and orientation. step 3: (same day, immediately after step 2) 1-on-1 interview with hiring manager. I was told to bring an updated résumé, but the immediate circumstances of the day conspired against me, so I did NOT have one. My enthusiasm, experience and general knowledge of the SolarCity "product" was enough to give the hiring manager confidence in my ability to be successful in the position.