Bureau of the Workers (Communist) Party and was a fraternal delegate to the party's 6th National Convention, held in New York City in March 1929. In 1932, Gebert co-founded the Polonia Society from an existing Polish-language section of the International Workers Order (IWO). He also became a national officer of the IWO. Up to the mid-1930s, he also served as organizer of the CPUSA's Chicago and Pittsburgh districts. (Later, Louis F. Budenz described of a conflict between Gebert and Morris Childs, District Organizer for Illinois, over Gebert's intrusion into Chicago and, in particular, over a "Czech comrade who was doing vital underground work for Gebert.") In 1936 Gebert helped found the Steel Workers Organizing Committee (SWOC) of the Congress of Industrial Organizations (CIO), for which he organized fraternal organizations of foreign-born Americans. Toward year-end, he organized a conference of fraternal organizations in Pittsburgh — a gathering attended by 447 representatives of various national origins, addressed by Philip Murray and greeted by John L. Lewis. During the 1930s, Gebert was a frequent contributor to the theoretical monthly of the CPUSA, The Communist. Gebert appears in nine intercepted NKGB messages between May and October 1944. Gebert was the contact of fellow Soviet agent, Oskar Lange, a Polish economist who was a personal emissary from President Franklin D. Roosevelt to Joseph Stalin on the "Polish question". Another Venona message reports Gebert's demand for a $500 balance the KGB still owed him on a one thousand dollar contract to publish a Polish-language book. After World War II, Gebert returned to the now Communist-dominated Poland, where he assumed a leading position in the state-controlled labor unions. From 1949 to 1950, Gebert was Secretary of the World Peace Council and from 1950 to 1957, the editor of Glosu Pracy. He returned to the United States in 1950 as United Nations representative of the World Federation of Trade Unions. From 1960 to 1967 Gebert served as the Polish People's Republic's Ambassador to Turkey. Personal life and death Gebert married two times. In 1920 in the US, he married Romanian-born Elvira Koenig (1898–1974); they had one son, Armand Gebert (1922–2009), a journalist who lived and died in Detroit. Later in Poland, he married Krystyna Poznańska-Gebert (1916–1991), of Jewish origin; they had two children: a daughter and son, Konstanty Gebert (born 1953), a Polish journalist and Jewish activist. Gebert died age 90 on February 13, 1986, in Warsaw. Works