I was phone interviewed by HR (general experience/salary expectations etc), then had an on-site interview with two people, followed by a second interview on another day with the hiring manager and a second person who was in a similar role. It was a pretty disorganized process for such a high profile firm. I had to follow up with them multiple times.

My interview process was communicative, straight forward, and respectful. I had a great experience and highly appreciate the opportunity and involvement; Gensler was really organized throughout the entire time. Overall, the whole thing took two whole months.