Initially you will be contacted by an HR person who will ask you some basic preliminary questions regarding your background/resume. Nothing out of the ordinary, standard stuff that you'll be asked during any job interview. The HR person will then relay their discussion with you over to the hiring manager for that position, typically it will be your manager/supervisor. Then you'll have another phone call with your manager and they will give you an idea of what the position is like. They may ask you some clarifying details about your background/resume. Once again it's nothing too extreme and it will be relevant to your position. Afterwards you may get another phone call interview with some of the colleagues you'll be working with, this will vary with your group. If you pass you'll then be invited to a face to face interview at PG&E in the city. The interview will consist of four group interviews (5 if you count the lunch) with a couple different people that you may work with, each session lasts about 30-45 minutes. They'll ask you about your background, experience, hobbies to get an idea of how you'll fit in. They will ask you how you react to different situations like work obstacles, career letdowns, achievements, key project milestones, etc. They'll want to use STAR style responses (Situation, Task, Action, Result). Each group will have a couple basic questions that they will all ask you and then they'll go with their scripted questions which are for various areas. There's alot of questions for each section but the interviewers will just pick and choose questions. None of the questions were too scary, it's just an endurance test really.