Keith was born November 3, 1930 in Denver, Colorado to Joseph and Lois (Hall) Mattingley. He was baptized April 16, 2018 and became a member of Lamb of God Lutheran Church in Lake Havasu City, Arizona.
Keith proudly served his country in the U.S Navy from 1952-1955.
He was united in marriage to Beverly Frese October 12, 1968 at Emmaus Lutheran Church in Denver, Colorado.They shared 53 blessed years of marriage.
Keith was employed at Rocky Flats, Dow Chemical. He was in sales of body shop equipment for many years, built boats, and also worked for an accounting firm.
Keith enjoyed snow skiing, boating,and water skiing, bowling, numerous other sports and dancing.H was also a member of the American Legion and the Elks.
He is survived by his loving wife Beverly, sisters Jean Palumbo, June Hamel, Evelyn Jones, Jody Pachello, Cleo Nordstrom and brother Leonard Mattingley. He is also survived by his in-law family, Janice Baessler, Donna James, Barbara Karau, Walter Frese, Patricia Bay, and numerous nieces and nephews.
Keith was preceded in death by his parents and brothers, Lawrence and Galen Mattingley. As well as his in-law parents Emil and Laura Frese and sister-in-law Dorothea Orvis.