I interviewed for the one in Goleta, CA. A recruiter called me 2 weeks after sending my resume over to Raytheon's careers website. She invited me to an on-site hiring event. They provide hotel/airfare if you're not local to their area. There were 12 candidates total including myself, and we all sat at a conference room. There were about 10 hiring managers, and one of them gave an introduction/presentation about Raytheon. Breakfast was included. 6 candidates interviewed first where each candidate interviewed with 2 hiring managers (30 mins each) while the other 6 listened to HR about benefits etc. and the junior engineers showed a demo. After that, the 2 groups switched. The entire thing lasted for about 3 1/2 hrs (8am - 11:30 am). Overall, the people there were really nice, and the office location is awesome (10 mins away from the beach).