Denny Jones has been a member of the Oregon Cattlemen's Association, and member and past president of the American Cattlemen's Association. He was on the board of directors of the Pacific International Livestock Exposition, and was director, 1973, and past member of the Board of Trustees. He is past executive board member for the Public Land Council representing 13 western states; and a member of the State House of Representatives, representing Harney, Lake and Malheur Counties. Denny is dedicated to the cause of agriculture. He has served nine years on the local school board, six years on the county Budget Board, and three years on the County Juvenile Council. His 26 years in the Oregon House of Representatives have included 18 years as a member of the Ways and Means Committee and Emergency Board and one term as co-chair of the Ways and Means Committee.