Brien O’Brien and his wife Mary Hasten make their primary residence in Chicago but have been seasonal residents of Martha’s Vineyard since the 1980s. Brien is Chairman and CEO of Port Capital, a global investment management firm which manages domestic and developed markets global equity strategies.

In addition to his career in the financial industry over the last 30 years, Brien has also been active in educational and conservation efforts. Brien is a Trustee of the University of Chicago where he also serves on the Executive Committee of the University. Additionally, he is the Chair of the Board of Trustees of the University of Chicago Medical Center. Brien serves as a Trustee for Boston College and is a member of their Investment and Endowment Committee. Brien graduated with honors from Boston College with a B.S. in Finance and Theology.

Brien previously served as a member of the Board of Directors of the Sheriff’s Meadow Foundation from 2010 to 2020. From 2017 to 2020 Brien served as President of the Board of Directors of the Sheriff’s Meadow Foundation. During his tenure he initiated the Sheriff’s Meadow Foundation Capital Campaign which concluded in December 2021. Along with other members of the Board, the staff of Sheriff’s Meadow Foundation, and the community, he was actively involved in the effort to secure Red Gate Farm, now Squibnocket Pond Reservation, which will be open to the public in fall 2022.