His career began as a graduate assistant at the University of Maryland in 1968, before moving to his first head coaching role at Woodrow Wilson High School in the early 1970s. He then gained experience as an assistant coach at Lafayette College (1971-1977) and Boston College (1977-1978). Williams’ collegiate head coaching journey commenced at American University (1978-1982), followed by tenures at Boston College (1982-1986) and Ohio State (1986-1989), consistently building competitive programs. His return to his alma mater, the University of Maryland, in 1989 marked a pivotal moment, as he revitalized a program facing significant challenges with a disciplined, development-focused approach.
In 2006, he surpassed Lefty Driesell to become Maryland’s all-time winningest head coach. He reached his 600th career win in 2008, the same year he secured his 400th victory specifically at the University of Maryland. By 2010, Williams had coached his 1,000th career game. He retired from coaching in 2011, concluding his career with an impressive 668 total wins across four universities.
Following his retirement, Williams maintained his close association with the University of Maryland athletic department, serving as Assistant Athletic Director and Special Assistant to the Athletic Director. His profound impact on college basketball was further cemented in 2014 with his induction into both the National Collegiate Basketball Hall of Fame and the Naismith Memorial Basketball Hall of Fame. In recognition of his enduring legacy, the playing surface at Maryland’s XFINITY Center was permanently renamed ‘Gary Williams Court’ in 2012, honoring his transformative contributions to the university and the sport.