Dave MacWilliams played four seasons of men’s soccer for Philadelphia “Textile” University. MacWilliams was a three-time Regional All-American (1976-78). In 1978, he captained his team to the NCAA Final Four. During that season, he led the nation in scoring with 22 goals and a school-record 16 assists for 60 points, earning national All-America honors. He ranks third on the Philadelphia University all-time scoring list with 47 goals and a school-record 43 assists for 137 points.
Following his time at Philadelphia University, MacWilliams went on to a stellar professional playing career. He was captain of the Baltimore Blast, where he was selected as the team's Best Offensive Player. The team's leading scorer and an all-star selection during his career, he later earned a position on the league's All-Decade team.
MacWilliams also played professional soccer for the NPSL's Chicago Sting, the Major Indoor Soccer League's Philadelphia Fever, the North American Soccer League's Philadelphia Fury and Tampa Bay Rowdies. He also played on the United States National Team from 1977-80, participating in the 1979 Pan American Games.
MacWilliams served four years as the head coach of the Philadelphia Kixx of the Major Indoor Soccer League. He also was the head coach of the MISL's Baltimore Spirit from 1993-95, and was an all-Star coach during his tenure with both clubs. He was inducted into the Baltimore Blast Hall of Fame on January 21, 2006.