Dennis has been involved in sport as an official, coach and administrator, devoting time to softball and track and field. With 20 years as a coach in softball, Dennis has guided teams to seven provincial championships and with the 1979 Bar K Junior Ladies, a trip to the nationals.
Dennis has also been a registered umpire for over 15 years and has served on numerous boards and leagues in fostering softball both locally and internationally.
Dennis has received numerous awards in recognition of his contribution: Award of Excellence in 1982 and Outstanding Service recognition in 1978 from Canadian Amateur Softball Association and 1981 from the Saskatchewan Amateur Softball Association.
In Track and Field, Dennis has been coaching for several years along with officiating for 20 years including Olympics, Commonwealth Games and World Student Games duty. He has been involved with numerous other ventures, Saskatchewan Games; Western Canada Games; Canada Games; Sask Sport Inc. and National Coaching Certificate program.
Dennis was the Saskatoon Kinsmen Sportsman in 1982 and awarded the 100th Century Award as a builder also in 1982. In 1987, Dennis was added to Canadian Track and Field Wall of Fame.