Jack O'Brien is a Director at Craig-Hallum Capital Group, based in the United States. He has been with the firm since March 2023. Prior to his current role, Jack served as Vice President at Craig-Hallum from May 2022 to March 2023.

Before joining Craig-Hallum, Jack was a Vice President at M3 Partners from January 2022 to May 2022 and a Senior Associate from June 2020 to January 2022. He also held the position of Summer Associate at M-III Partners, LP in 2019.

Earlier in his career, Jack worked in Business Development at Loup Ventures from January 2018 to May 2018 and as an Equity Research Associate at Cowen and Company from February 2016 to March 2017.