Law clerk to chief magistrate John M. Murtagh, New York City, 1959-1960. Law clerk to justice Tom C. Clark Supreme Court of the United States Court, 1960-1961. Associate Hale Russell & Stentzel, New York City, 1961-1962, Mudge Rose Guthrie & Alexander, New York City, 1979-1980.
Of counsel Farrell, Fritz, Caemmerer, Cleary, Barnosky & Armentano, Mineola, 1982-1983, Havens & Lombard, Flushing, 1994-1995. Professor Fordham University Law School, 1962-1968. Professor law Hofstra University Law School, 1968—2010, founding dean, 1968-1973, Bachelor of Science Wilzig distinguished professor banking, 1985—2008, founding dean emeritus, since 2010.
Visiting professor University Texas Law School, 1973-1974. Executive director, special New York State assistant attorney general Meyer Investigation of State Police Murder Coverup Charges Against the Special Attica Prison Riot Prosecutor' General’ s Office, 1975. Chief counsel New York Governor's Special Committee on Criminal Offenders, 1966.
Member Nassau County Board Ethics, 1983-1996, chairman, 1989-1996. Chairman merit selection committee EDNY Bankruptcy Judges, 1985-1988.