After the Uprising, he graduated in history from Sofia University and afterwards specialized in Switzerland. In 1908 Siljanov was elected to the leading body of IMARO and made unsuccessful attempts to save the unity of the organization. During the Balkan Wars he was the leader of a cheta in Southern Macedonia and supported the Greek and later the Bulgarian Army during their invasions. During the First World War, he was imprisoned in Sofia as a Russophile, when Bulgaria was fighting against Russia. After the wars he settled in Sofia and worked there as a writer, publicist and journalist. Later he also became a politician and a member of the Macedonian Scientific Institute. His son Evgeny Silyanov was a prominent Bulgarian diplomat.