He worked for
Wall Street law firm
Milbank, Tweed, Hope, Hadley & McCloy, then Hale, Stimson, Russell & Nickerson. From 1970 until his appointment to the bench in October 1977, Nickerson was a name partner and litigator with the firm Nickerson, Kramer, Lowenstein, Nessen, Kamin & Soll, now known as
Kramer Levin Naftalis & Frankel.
Nassau County Executive Nickerson served as Nassau County Executive in New York from January 1, 1962 to December 31, 1970. Entering politics, was the first
Democrat to win a countywide seat in
Nassau County, New York since 1912, when the
Bull Moose Party split the Republican vote. As county executive, Nickerson was an early advocate of environmental protection, expanded Nassau County's park system, recruited college graduates for the police force, and took a progressive approach to the
War on Poverty. As part of the War on Poverty effort, Nickerson increased public transit in Nassau County, supported
community action programs, and attempted to create an
Office of Economic Opportunity plan for the county at the end of his term which was largely rejected by the incoming
Nixon administration. He later described his years as county executive as reorienting "government to concern itself with human beings and their problems." == Failed nomination to the Second Circuit ==