I applied in-person. The process took 1 day. I interviewed at RTX (Aurora, CO) in Jan 2016
Interview
Go to career fairs that Raytheon hosts for the best results. I went to it after I applied to several positions without getting a bite, but while I was there I had 3 departments battling to hire me to where I had an offer letter within a few hours of doing the interview and got my pick of where I wanted to be.