Beloved son, father, grandfather, and friend, Dennis had a passion for music which led to a life-long career as an entertainer and recording engineer. Avid runner and hiker, he loved spending time in the mountains of New Mexico. He is survived by his daughter and son-in-law, Andi & Ty Govitz, daughters Kathi Murtagh, Jessica Robertson, and Breanna Robertson, 3 grandchildren and 3 great-grandchildren, dear friends Carole Robertson, Marilon Speed, and Lyndon Parker. He was preceded in death by his parents Lawrence and Mary Robertson, sons John, Dennis II, and Joshua Robertson, his brothers and a sister.