In 1955 Olesen was part of the CIA team who secretly listened in the leftist politicians Ragnhild Andersen and Alfred Jensen. He also worked in a private intelligence organisation called Arbejdernes Informations Central (Danish: Information Centre of the Labour Movement) financed by the labour movement.
In 1955, Olesen was part of the CIA team that secretly monitored leftist politicians Ragnhild Andersen and Alfred Jensen. He also worked in a private intelligence organization called Information Centre of the Labour Movement, funded by the labour movement.