Dennis became a high school official in 1977 and immediately joined the AOA that same year. He was assigned to his first state series game in 1983 and continued to work in regional and sectional rounds through 1990, when new regulations disallowed college officials to work high school level games. Bracco worked collegiately in the CCIW and the NIIC starting in 1983 and was assigned his first Division 1 college game in 1984. Bracco would officiate at the Division 1 level for the next 28 years, including the Mid-Continent, Horizon, Sun Belt, Ohio Valley, Big Ten and Conference USA. Highlights included working his first NIT Game in 1999, his first NCAA Tournament game in 2000 and working both the Division 2 and Division 3 NCAA Tournaments three times each. Now retired from officiating, Bracco continues his involvement with the AOA by participating in Zoom meetings.