Sergei Katsiev was born in Moscow, Russia, Russia. Sergei Katsiev, partner of billionaire Igor Kesaev, made his fortune in tobacco after the fall of the Soviet Union. From 1991 to 1993, he worked in the government trade mission to the Netherlands. When he returned to Russia, he headed Mercury Tobacco Corporation, an importer of tobacco products owned by Kesaev. In 1998 Katsiev founded his own company, Megapolis, which also sold tobacco products. In 2006 Katsiev and Kesaev merged their companies. Megapolis is now Russia's largest seller of tobacco products. In December 2013 Philip Morris and Japan Tobacco International (JTI) bought 40% of Megapolis for $1.5 billion, in one of the biggest deals ever in the Russian consumer market. He is now the owner of Nizhny Karmadon, a mineral water sourced from the Caucasus.