Here’s a complete report on in Season 4 of Suits . 1. Overview: Mike’s Position at the Start of Season 4 At the end of Season 3, Mike Ross left Pearson Specter after his secret (no law degree) became known to Jessica and Harvey, and after his grandmother’s death. He turned down Harvey’s offer to return and instead became an investment banker at Gillian Industries (later Sidwell Investment Group), working for Jonathan Sidwell.