Took about 3 to 4 weeks total. Initial HR interview followed by take-home assignment involving writing a scientific American style article about an academic article plus a ppt presentation. I was told I would present the ppt at my next interview to the hiring mangers - it never even came up and I got no feedback. Next interview was all behavioral Qs, and one more interview was with team members with more behavioral Qs. The ppt part like unnecessary stress but overall it was a positive experience.