Coyne worked as a businessman and consultant. He served as lecturer at the
Wharton School, University of Pennsylvania from 1974 to 1979. He was president of Coyne Chemical Corporation from 1971 to 1981. Coyne was supervisor of
Upper Makefield Township in 1980. He was elected in
1980 as a Republican to the
97th Congress. He was an unsuccessful candidate for re-election in 1982. Coyne served from 1983 to 1985 as a special assistant to President
Ronald Reagan. He was director of the White House Office of Private Sector Initiatives from 1983 to 1985. He was chief executive officer of the American Consulting Engineers Council from 1985 to 1986. He was president of the
American Tort Reform Association from 1986 to 1988. In 1987, he founded Americans to Limit Congressional Terms. Coyne co-authored
Cleaning House with
John Fund. The publication promoted state referendums to set term limits for members of the U.S. Congress. In 1994, he was chosen president of the
National Air Transportation Association, where he served until 2012. ==Personal life==