 He traveled to India, South Africa, Latin America, and within the United States for its market-oriented planning and management educational programs.His clients included Dow Chemical Company, Rockwell International, Steelcase, Bemis Manufacturing Company, Grupo Industrial Alfa, Coredemex, Lear Siegler, the Sarns division of 3M, and United Nations businessmen in Costa Rica.McCarthy was a member of the American Marketing Association and the Economics Society.