Dennis was born and lived most of his life in Wisconsin. He is married to Robin and they have seven children, 33 grandchildren and great-grandchildren.

He was a business man for 34 years, pastor for 6 years. He began working in missions in 1985 with his wife Robin leading annual short-term trips to Central America. In 2002 he began to serve full-time with PathFinders International as the Director of International Development.

 In 2007 he founded Going Global Inc. and is currently the Board Chairman. Going Global Inc. is a mission organization that partners with indigenous leaders in 10 nations and ministers to orphans, widows, and pastors in remote areas. They focus on equipping, connecting, providing resources and teaching. He has an earned Masters of Ministries and a Doctorate in Theology.

Dennis currently serves as the Groups and Missions Pastor for Elevation Church.