In 1949, after the Communist takeover in China, he relocated to Hong Kong where he served as president of the company in 1950.
[11][12] He served as the chairman of the Technical Surveillance Countermeasures Committee, which involved securing American facilities against electronic eavesdropping.
[7] Evan Thomas wrote that Roosevelt was the person who originally suggested the CIA project that attempted to poison Fidel Castro.
[13] Roosevelt, as a head of the CIA technical division, supervised Sidney Gottlieb, who brought a biological poison to Congo during the autumn of 1960.
Roosevelt retired from the CIA in 1973 and had served in retirement as a defense consultant and on the board of Aerospace Corp.[7] Roosevelt had many lifelong hobbies and interests and published about them: the archaeology of Peru, the history of early sugar processing machines in the Caribbean,[14] Japanese Netsuke carvings, and scuba-diving.