Kisevalter continued to be involved in agent recruitment and handling, including the case of KGB walk-in Yuri Nosenko, whom he helped Nosenko's recruiter and long-term handler, Russian-speaking CIA officer Tennent H. "Pete" Bagley, interview five times when Nosenko walked in to CIA in Geneva, Switzerland, in late May, 1962. He also briefly dealt with KGB walk-in Anatoliy Golitsyn when Golitsyn defected to the U.S. in December of 1961. The curiously overlapping-but-contradictory information from Golitsyn and Nosenko (who worked in different departments of the highly compartmentalized KGB) helped to precipitate a mole hunt by the CIA's counterintelligence chief, James Jesus Angleton. Golitsyn claimed that Yuri Nosenko was a KGB plant, which led to Nosenko's incarceration and harsh interrogation for about three years. Kisevalter apparently "never accepted the case for a mole in the CIA or the argument that Nosenko was planted by the KGB".