In the 1920's, the Pullman Company formed company-wide occupation-based unions (Plan of Employee Representation) to thwart the outside union organization of its employees. This policy was abruptly terminated with the 1934 passage of the amended Railway Labor Act, which guaranteed workers free choice of union representation. From that date on, the company accepted outside unions and negotiated with those bodies to reach agreements governing working conditions, wages, hours, vacations, etc.

Plan of Employee Representation (1921-1934) and labor union (1920-1969) files.

Plan of Employee Representation files include booklets and manuals, final election and nominating election results, conference minutes, and agreements for barbers, clerks, porters and maids, and shops and yards workers. Labor union files contain agreement proposals, documentation, correspondence, drafts and working papers, agreements and memoranda of understanding, and rule interpretations. There are also union information files (1920's, primarily) and issues of The Sleeping Car Conductor, 1927-1940, The Messenger, 1925-1928, and Pullman Porter 's Review, 1925.

Labor union agreements are also located in Record Group 06/01/03, General Labor Files, Record Group 02/01/06, Secretary and Treasurer Contracts and Agreements (original signed copies), and Record Group 05/01/02 Operating Department Special Files.