Donald L Dennison, Maryland, played soccer as a goalkeeper in Prep School and on his college club team. He also coached Youth soccer.

Don became a certified soccer referee in 1975 and joined NISOA in 1985. He managed over 3,500 soccer matches at the Youth, Amateur, Professional (ASL) and College levels.

In 2007 he became a NISOA National Clinician and a NISOA National Assessor. He served as an officer at the local Chapter level and was a member of the Metropolitan Washington Soccer referees Association (former president and served on the executive board).

At the national level since 1997 he has served as an active Staff Clinician and Assessor at the NISOA Referee Training Camps at Elizabethtown College, PA and at the University of Central Florida. In addition he has conducted numerous NSCAA and NISOA Regional Clinics.