Initially I was contacted by the recruiter and interviewed by her, Then I was interviewed by the Senior Manager, Program Management in a week. Once I cleared this I was asked to come for an inperson interview with a bunch of folks. I had to do a Project Plan for a web site development/redesign. Once I did that I had another PM interview me. Then I was given the go ahead by the recruiter, and then asked to meet with the Director. It was straight forward and the interview did not pan out ok, saying one of the skills was lacking. Then I was set up to interview at Chicago and then I got the job after a couple more of phone interview.
the process for Sapient is very gruelling and once in the company you realize how important the interviews are.