 Born in Leningrad, Soviet Union, Chuychenko graduated from the Law Department of Leningrad State University in 1987 as a fellow student of Dmitry Medvedev.From 1989 to 1992 Chuychenko served in the KGB.In March 2001 he became the Chief of the Legal Department of Gazprom and since April 2002 he has been a member of the management committee of Gazprom.