Denny is married to the former Kathy Roberts. They have been married since January 1978. They have three children (Lance, Brett, and Laura), and five grandchildren (Chloe, Ashlyn, Sophie, Easton, and Brelyn). He has served as the President of the Bear Valley Bible Institute since 2004 and has been a full-time instructor since 1985. He has preached in Mississippi, Arkansas, Nebraska, and Colorado. He has taught numerous classes for the World Video Bible School and has authored several books and commentaries. He graduated from the Bear Valley School of Preaching (now Bear Valley Bible Institute), received an AA degree in Bible (York College, York, Nebraska), BA in Bible and Biblical Languages (Harding University), MA in Old and New Testaments (Harding Graduate School of Religion), and a Ph.D. in Religious Education (University of Nebraska).