(here, mounted state police threatening to strike in
Homestead, Pennsylvania) Saposs worked in a variety of positions over the next few years. He was an accident prevention investigator for the New York Department of Labor, In 1920, he became an economic consultant to the
Labor Bureau, Inc. (founded by
George Henry Soule Jr. along with
Evans Clark and Alfred L. Bernheim) through 1922. In 1934, Saposs became research director for the
Twentieth Century Fund's newly founded labor unit and remained an associate there through 1945. The research conducted under Saposs' leadership proved critical to winning over the
Supreme Court of the United States, which held in
National Labor Relations Board v. Jones & Laughlin Steel Corporation, 301 U.S. 1 (1938) that the
National Labor Relations Act (NLRA) was constitutional. However, Saposs' tenure at the NLRB proved short. Although it had once supported the NLRA, the
American Federation of Labor (AFL; which supported
craft unionism) became convinced that the Board and its staff (including Saposs) were more supportive of the
industrial unionism of its competitor, the
Congress of Industrial Organizations. The AFL allied with anti-union
Democratic Representative Howard W. Smith to attack the National Labor Relations Board. Saposs was a leader among anti-communist leftists. He had even been surreptitiously assessed by members of the
Communist Party USA for membership, and rejected as a prospect. He had also tried to expose those individuals at the Board who he felt were communists. But Smith and others attacked Saposs as a communist, and the
United States Congress defunded his division and his job on October 11, 1940.
Other federal positions (here, 1940) Later in 1940,
Republican Nelson Rockefeller hired Saposs as a consultant on labor issues to him for the
Office of the Coordinator of Inter-American Affairs in the
White House through 1942. In 1945, Saposs became Chief of the Reports and Statistics Office in the Manpower Division of the
Office of Military Government, United States, in post-World War II Germany. He left that position after a year to become Special Assistant to the Commissioner of Labor Statistics in the
United States Department of Labor. In 1936, he became Special Assistant to the Commission of Labor Statistics at USDOL. In 1948, he became Special Advisor to the European Labor Division of the United States
Economic Cooperation Administration. In 1952, he returned to Labor Statistics and retired from federal government service in 1954.
Academia again ) at the
University of Illinois at Urbana–Champaign (here, original University Hall) In 1954, Saposs became a senior research associate at the Littauer Center for Public Administration at
Harvard University through 1956. In 1955, he served the
United States Department of State as lecturer on American and foreign labor issues at the
Foreign Service Institute through 1963. In 1957, he was a visiting professor for a year at the
Institute of Labor and Industrial Relations at the
University of Illinois at Urbana–Champaign. In 1959, he was appointed Professor of American and International Labor in the
School of International Service at
American University in
Washington, DC, and retired from there in 1965. While at American, he served as a lecturer on international labor at the
Defense Intelligence School of the
United States Department of Defense (1961-1964) and a senior specialist at the
East–West Center of the
University of Hawaii (1962-1964). ==Personal life and death==