Roosa claims that Sjam helped PKI leaders D.N. Aidit and M. H. Lukman "reappear" at Jakarta's Tanjung Priok port after they had pretended to go into exile following the Madiun Affair in 1948 when there was an abortive left wing coup attempt.
In 1964 or 1964, Sjam, was appointed head of the PKI Special Bureau [REF].