Koshunov was born on 2 April 1968 in the city
Bălți in the
Moldavian SSR. In 1974, the family moved to
Bender. In 1985 he graduated from high school and then studied at
Kharkov Aviation Institute in the
Ukrainian SSR. He graduated in 1991 with honours in the speciality of engineer-technologist of radio-electronic equipment. From 1992 to 1996 he served as a
police lieutenant in the city of Bender. In 1999 he studied at the Belgorod University of Cooperation, Economics and Law in
Russia, graduating in 2002 with a law degree. In June 2011 he graduated
Belgorod State National Research University, majoring in state and municipal government. == Political career ==