Member planning board Town of Tuxedo (New York ), 1971-1976. Served to captain United States Air Force Reserve, 1961-1972. Member Order of Coif.
Associate White & Case, New York City, 1962-1971, Skadden, Arps, Slate, Meagher & Flom, New York City, 1971-1972, partner, 1972-1991. Conservation lawyer, sole practitioner Michael H. Testa, since 1992. Advisor United States delegate to United Nations Conference on Straddling Fish Stocks and Highly Migratory Fish Stocks, 1994-1995, United States delegate to Kyoto International Conference on Sustainable Contribution of Fisheries to Food Security, 1995, to Northwest Atlantic Fisheries Organization, 1996, 98, to 22d Session of Food and Agriculture Organization Committee on Fisheries, 1997, to Western and Central Pacific Fisheries Conference, 1998-2001.
Adjunct associate professor law New York University Law School, 1986. Member consultative committee to secretaries state and commerce Northwest Atlantic Fisheries Convention, 1996-2002.