- Associate Haight, Gardner, Poor & Havens, New York City, 1962-1970, partner, 1970—1982. Resident partner Finley Kumble Wagner Heine Underberg Manley Myerson & Casey, Washington, 1983-1987, Laxalt, Washington, Perito & Dubuc, Washington, 1988-1990, Washington, Perito & Dubuc, 1990-1991. Partner Graham & James, 1991-1995, of counsel, 1996-1998, Cohen Gettings & Dunham, 1998—2003, Dubuc & Associates PC, since 2003.
- Bar: New York 1963, District of Columbia 1972, Virginia 1999. United States District Court (southern and eastern districts) New York 1964, United States Court 2nd District Court of Appea circuit) 1965, United States Supreme Court 1970, District of Columbia 1972, United States Court Appeals (District of Columbia circuit) 1972, United States District Court District of Columbia 1973, United States Court Claims 1975, United States Court Appeals (4th circuit) 1977, United States Court Appeals (7th circuit) 1984, United States Court Appeals (9th circuit) 1985, United States Court Appeals (5th circuit) 1986, United States Court Appeals (federal circuit) 1988, United States Court International Trade 1988, United States Court Appeals (6th circuit) 1989, Virginia 1999. Certified court mediator 1998.
Captain Air Corps United States Navy, 1954-1959, Reserve 1959-1979. Member of American Bar Association (vice chairman insurance committee 1982-1984, chairman aviation and space law committee 1985-1986, subcommittee aviation insurance, subcommittee international practice 1985-1987, vice chairman alternative resolution committee, marketing legal services committee 1991-1992), Association of Trial Lawyers of America, International Society Air Safety Investigators, International Bar Association, Defense Research Institute (past chair alternative dispute resolution committee 2003-2005), Federal Insurance and Corporation Counsel (past chairman alternative dispute resolution section 1996-1999, aviation transportation 1996—2001), International Association Defense Counsel (past chairman alternative dispute resolution committee), Maritime Law Association United States, Federal Bar Council, Federal Circuit Bar Association, Association Bar of City of New York (aeroav. committee), Virginia Bar Association, District of Columbia Bar Association, New York State Bar Association (past chairman aviation law committee), Boston College Law School Alumni (president Washington chapter 1992-1996), Naval Aviation Command (past vice Commander), Congressional Country Club, Cornell Club, Sigma Chi.