Following the Korean war, Poshepny joined the Bangkok-based CIA front company Overseas Southeast Asia Supply (SEA Supply), which provided military equipment to Kuomintang forces based in Burma. In 1958, Poshepny tried unsuccessfully to arrange a military uprising against Sukarno, the president of Indonesia. From 1958 to 1960, he trained different special missions teams, including Tibetan Khampas and Hui Muslims at Camp Hale for operations inside China against the Communist government. Carole McGranahan quotes Poe from an interview that the Tibetans he trained "... were the best I ever worked with." Poshepny sometimes claimed he personally escorted the 14th Dalai Lama out of Tibet, but this is denied both by former CIA officers involved in the Tibet operation and by the Tibetan government-in-exile.