Haskell was the personnel manager of Speakman Co. in 1947 and 1948, and president of Greenhill Dairies, Inc., from 1948 until 1953, and then owner and operator of Hill Girt Farm in
Chadds Ford, Pennsylvania. He was secretary of the Departmental Council of the
United States Department of Health, Education, and Welfare in 1953 and 1954, consultant to the special assistant to U.S. President
Dwight D. Eisenhower in 1955, He served in the Republican minority in the 85th Congress but lost his bid for a second term in 1958 to McDowell. Haskell served from January 3, 1957, until January 3, 1959, during the administration of U.S. President Dwight D. Eisenhower. He was elected mayor of Wilmington, Delaware, in 1969, serving one term until 1973, the most recent Republican to serve as mayor of Wilmington. In 1970, he was appointed a member of the President's National Reading Council and was president of
Abercrombie and Fitch. He also worked with Computer International, Computer Time Sharing, Inertial Motors Corps, and Interpoint Corp. == Advocacy ==