Dennis Heck attended Columbia River High School and thereafter until 1973, the Evergreen State College in Olympia. He then continued his education until 1975 continued at Portland State University. He then worked as a freelance contractor. He was co-founder and is the current president of the company Intrepid Learning Solutions, which provides training and learning programs. Heck was also involved in the founding of the television station TVW, which deals with regional political events in the state of Washington. Politically, he joined the Democratic Party. Between 1976 and 1986 he was a delegate in the House of Representatives from Washington. He led from 1977 to 1985, the Democratic group. Thereafter, he served from 1985 to 1987 as Director of Administration in the House of Representatives (Chief Clerk of the State House of Representatives ).
Between 1989 and 1993, Heck was chief of staff of Governor Booth Gardner. In 2010, he ran unsuccessfully for even the U.S. House of Representatives. In the congressional elections of 2012, he was then but newly decorated tenth electoral district of Washington in the U.S. House of Representatives in Washington DC chosen, where he took up his new mandate on January 3, 2013. In the election, he sat down with 58:42 percent of the vote against Republican Dick Muri by.
Heck is married and the father of two sons since 1976.