On July 1, the Dartmouth Board of Trustees will welcome four new members to serve four-year terms. Sarah Harris ’00 and Peter Roby ’79 join as alumni trustees; Holden Spaht ’96 and William “Bill” Tyree ’85 will be charter trustees.
“Each of these new trustees is an alum who brings a deep commitment and history of service to Dartmouth and a wealth of expertise to share,” says Trustees Chair Gregg Lemkau ’91. “They are fantastic additions to the board, and I look forward to our work together in support of our mission and our students.”
Lemkau also thanked the four trustees who are completing their terms this month for their “indelible impact on Dartmouth.” The outgoing trustees are Jeffrey Crowe ’78, Eileen Chamberlain Donahoe ’81, Christopher Lord ’86, and Elizabeth Cahill Lempres ’83, Thayer ’84, who served as chair from July 2021 through December 2025.
The 26-member board consists of a total of 16 charter trustees, nominated and elected by the board; eight alumni trustees, nominated by the alumni and elected by the board; and two ex officio members, Dartmouth’s president and the governor of New Hampshire.
Sarah Harris ’00
Harris is vice chairwoman of the Mohegan Tribal Council and vice chairwoman of the Mohegan Tribal Gaming Authority, the first Mohegan woman to attend Dartmouth—and now the first Mohegan trustee.
She is also a descendant of Samson Occom, the 18th-century Mohegan scholar and minister whose fundraising efforts helped found the school that became Dartmouth.
After majoring in Native American studies at Dartmouth and earning a JD from American University Washington College of Law, Harris practiced law in Washington, D.C., representing Native American tribes and tribal entities and organizations. In 2010, she was appointed special assistant to the solicitor of the U.S. Department of the Interior and went on to serve as chief of staff to the assistant secretary of Indian Affairs, working on policy issues related to tribal sovereignty. She was elected to the Mohegan Tribal Council in 2017 and became vice chairwoman in 2019.
Harris is also a member of the U.S. Department of Justice’s Tribal Nations Leadership Council.
In 2022, her efforts as a member of Dartmouth’s Native American Visiting Committee helped bring about the repatriation of Samson Occom’s papers to the Mohegan Tribe, a story recounted in the award-winning 2026 documentary Forgotten Founder: The Untold Story of Samson Occom and Dartmouth—a co-production of the Mohegan Tribe and Dartmouth in which Harris appears prominently.
The secretary of the United South and Eastern Tribes Sovereignty Protection Fund, she was a 2016 recipient of the National Center for American Indian Enterprise Development’s “Native American 40 Under 40” award. Harris and her husband, Matt, are the parents of twins, Madeline and Jase.
Peter Roby ’79
For more than a decade, Roby—who served as Dartmouth’s interim athletics director from February 2021 through June 2022 and is currently interim CEO of USRowing—was director of athletics and recreation at Northeastern University. During his tenure leading the 18-sport department, 17 teams won postseason conference championships and 15 teams competed in NCAA tournaments.
While at Northeastern, Roby served a five-year term as a member of the NCAA Division I Men’s Basketball Committee, which selects and seeds the annual NCAA tournament field. Previously, he led Northeastern’s Center for the Study of Sport in Society, which seeks to create social change using the influence and appeal of sports.
A government major at Dartmouth, Roby served as co-captain of the men’s basketball team his senior year and began his coaching career as the team’s assistant coach, going on to serve as an assistant coach for the U.S. Military Academy, Stanford University, and Harvard University, and six seasons as Harvard’s head coach.
In 2007, Roby, who has a master’s degree in leadership from Northeastern, was named one of the 100 most influential sports educators in America by the Institute for International Sport, and in 2020 he was inducted into Northeastern’s Athletics Hall of Fame.
Roby served for eight years as a member of the Knight Commission on Intercollegiate Athletics, which works to develop and lead change that prioritizes the education, health, safety, and success of student-athletes, and is a strategic consultant to the NCAA and its leadership development programs.
In addition to his work in athletics, Roby spent over 10 years at Reebok, including three as vice president of U.S. marketing. He has served as an at-large representative on the Dartmouth Alumni Council, as secretary of his class, and as a volunteer for the Dartmouth College Fund.
Roby and his wife, Debbie Gries, have five children in their blended family.
Holden Spaht ’96
Spaht is a managing partner at the software investment firm Thoma Bravo, which he joined in 2005 and helped build into a $172 billion private equity and credit firm with a string of landmark deals, including several exceeding $10 billion. He has held more than two dozen corporate board seats and is currently serving as a director of 10 companies including Nasdaq, Dayforce, Coupa, and Anaplan.
The son of educators, Spaht grew up in Baton Rouge, La., and majored in economics at Dartmouth, graduating with honors. He competed for four years on the varsity men’s tennis team, helping to win the 1993 Ivy League championship, serving as captain his senior year, and earning All-Ivy recognition and three Academic All-Ivy selections.
After graduation, he studied international politics at the University of Cologne on a Fulbright Scholarship and went on to earn an MBA from Harvard Business School. He began his career as an analyst at Morgan Stanley in New York, with subsequent roles at Thomas H. Lee Partners in Boston and Morgan Stanley in London and San Francisco.
In 2019, Spaht and his wife, Claire, founded the Spaht Family Foundation, which focuses on youth mental health, the arts, environmental conservation, and humanitarian assistance, and for which Spaht serves as president and chair. The Spahts have supported Dartmouth Peak Performance and are members of the Founders Circle of the Kirsten and Eugene F. “Buddy” Teevens ’79 Center for Peak Performance.
Among other philanthropic efforts, the Spahts are lead donors to the Lindley Center, Washington & Lee University’s student health and wellness clinic, named for Spaht’s late sister. Spaht also chaired the board of trustees of Schools of the Sacred Heart San Francisco.
He and Claire have two daughters, Eliza and Peyton ’29.
William “Bill” Tyree ’85
Since 2016, Tyree has served as managing partner of Brown Brothers Harriman & Co., one of the largest private investment banks in the United States, which he joined in 1985 as a corporate lending officer in the Private Banking division.
Over the course of a career spanning nearly four decades, he has helped guide the firm through significant industry changes and global expansions. He was named a partner in 2001 and spent eight years as the global head of BBH’s Investor Services business and 16 years leading the Treasury & Markets Division. He currently chairs the firm’s executive committee and is a member of its finance committee.
Tyree is chairman of the board of trustees for The Boys’ Club of New York, a 140-year-old social service organization serving over 3,000 boys and young men in New York City. He also serves on the boards of the Appalachian Mountain Club, the U.S. Ski & Snowboard Foundation, the Gladys & Roland Harriman Foundation, and numerous community clubs and organizations in New York City and Long Island.
He majored in English at Dartmouth and went on to earn an MBA from the University of Pennsylvania’s Wharton School. He and his wife, Kathryn George, have three children, Brophy ’18, Hutch ’21, and Didi ’23.