Buchholz served as a governor of the New York Stock Exchange and became a force in the securities and banking industry. As a staunch supporter of higher education, he served on the UNT System Board of Regents from 2007 to 2013 and helped lead the system during record growth.
In 1999, Buchholz received UNT's Outstanding Alumni Service Award. He and his wife, Ruth, provided a gift to establish UNT's Bill J. Priest Center for Community College Education, a research center studying critical community college issues. They also have supported UNT through scholarships and gifts.