As a politician, he was elected representative of Elis in the Second National Assembly at Astros, and was chairman of the Third National Assembly at Troezen and of the Fourth National Assembly at Argos. In early 1825, during the Greek civil wars of 1824–1825 he and his son Chrysanthos Sisinis were arrested and imprisoned in Hydra. Released in spring, they returned to an active part in the military operations.