He was born on 11 January 1977 in Upper Salda, Sverdlovsk Oblast. He studied at the Nizhny Tagil Pedagogical Institute and later received a degree in play-writing from the Ekaterinburg Theatre Institute.
Sigarev became well-known as the author of plays: LADYBIRDS, A POLYGRAPH, BLACK MILK and especially PLASTICINE that was staged at different theatres in Moscow, London, Hamburg. PLASTICINE was awarded a lot of prizes, among them “Antibooker” and “Evening Standard Theatre Award”.
He is the laureate of film festivals at Karlovy Vary and Zurich, and also of the “Kinotavr” film festival in Sochi. He was nominated to the national award “Nika” in the "Discovery of the Year" section.