I applied through university. The process took 3 weeks. I interviewed at AECOM (Chelmsford, MA) in Dec 2016
Interview
First was a phone interview. And a in person interview was scheduled in the following week. I spoke to the department leader first, and then 4 more people were waiting for me to talk/ask questions. They asked what other companies have you interviewed with, or why you don't want to stay your intern company...That made me feel uncomfortable. You would also have a chance to walk around their office.
I applied online. The process took 2 months. I interviewed at AECOM (Roanoke, VA) in Nov 2018
Interview
Quick and painless, hiring managers do their job well and screen you quickly. There were two phone interviews before the face to face interview, but they were only about 15-20 minutes each and involved a lot of talk about the company and what they do.
Prescreen interview over the phone was okay! I was not given that chance to ask any questions so I don't know how well I did. Just have to wait and see