A rigorous processs of multiple, face to face, individual and team interviews. Equally rigorous back ground check. Physical exam. This is an extremely thorough process, detailed and exacting. You need to have your act together for each and every phase of the process. You will do well to understand exactly who you will be interved by, what their biases, likes and dislikes are, and be diplomatically saavy during the panel interviews - evryone must give you a thumbs up. Anyone can shoot you down.