ZS holds its reputation as the seventh most difficult job interviews by Forbes. The case studies are difficult to maneuver and test your intelligence. Subject matter knowledge is tested as well so it’s important to have a deep understanding of the speciality area you are applying for. The peers, managers and principals all exemplify the company’s culture of collaboration and the interview is a healthy exchange of strategic ideas. Steps involved an initial call with the HR, Round One with Manager and Principal followed by Final Round with Principals and Partners and included a presentation.