4 rounds,
1: 30 min virtual with HR, very simple
2; 30 min virtual with HR and manager, very simple
3: 2.5 hour in person with manager plus 2 other people talking for half hour each followed by writing test and math quiz
4: 3.5 hour hour in person, meet with 5 people for half hour followed by case study
Overall not very difficult, know your stuff about yourself and your motivations. It was a gauntlet though, 4 rounds is crazy.