Fairly lengthy. 6-weeks in my case due to scheduling conflicts. Multiple interviews. Recruiter (phone), Recruiter again (phone), Hiring Manager (in person), Hiring Manager's Manager (phone), Hiring Manager again (in person), Hiring Manager and team (in person). Very thorough. Final panel interview consisted of a role play of a sales call with multiple people in the room acting as clients. Pretty tough process, but after accepting and then meeting my fellow new hires in our 5-week training marathon (even more brutal) it was mutually understood that Gartner's process yields results.

Interview had 3 stages. the last one with your VP, you had to roleplay. Recruitment will prepare you thoroughly for the process. With some prep it is doable. very generic,