Marzani was NORD. In 1945 Marzani transferred to the Department of State, where he worked as the deputy chief of the Presentation Division of the Office of Intelligence. Marzani handled the preparation of top secret reports. After the war, the OS was split up. Marzani's branch was moved to the State Department, where he was the deputy chief of the Presentation Division of the Office of Intelligence. In 1946 Marzani founded and directed Union Films, a film documentary company that had contracts with the United Electrical, Radio and Machine Workers of America (UE) and other unions to do documentaries. One film entitled Deadline for Action, was released in September 1946, five weeks before Marzani resigned from the State Department. The film "severely criticized powerful corporations such as General Electric and Westinghouse", whose workers the UE had organized. In January 1947 Marzani was indicted for defrauding the government by receiving government pay while concealing CPUSA membership; specifically, for having made false and fraudulent statements in a matter within the jurisdiction of an agency of the United States Government in violation of Section 80 of Title 18 of the United States Code Annotated. An unsympathetic account of his case, written by one of the participants in both the events and his trial, appeared in the anticommunist magazine Plain Talk. He was convicted on 22 June 1947. Arthur Garfield Hays represented Marzani pro hac vice with Allan R. Rosenberg with Charles E. Ford and Warren L. Sharfman. Following conviction, Belford V. Lawson Jr. filed a brief on behalf of the National Lawyers Guild and Joseph Forer filed a brief on behalf of the Civil Rights Congress as amicus curiae urging reversal. Nine counts were overturned on appeal, while the Supreme Court split 4-4 on a rare rehearing of the last two charges. Marzani served all but four months of a thirty-six-month sentence. In July 1947, Emile Despres vouched for Marzani's loyalty. In August 1947, Despres again "testified emphatically" for his loyalty before the House Committee on Un-American Activities. In December 1947, Time magazine reported Marzani among other "unwelcome guests" to speak at six US colleges, whether "Republicans, Democrats, Communists, Buchmanites, Zoroastrians, or ecdysiasts". The article mentioned Gerhart Eisler and Marzani ("dismissed by the State Department for concealing his Communist card") together and that it was the University of Wisconsin which had barred him. Despite the adversity of this period, Marzani continued actively making