Sigachev began his racing career in karting . In 2007 he moved to the Formula Racing , where he made his debut in the Formula Renault 2.0 NEC . For the team SL Formula Racing , he finished 21th in the championship. He also took part in two races in the Eurocup Formula Renault 2.0 for the same team for which he scored no points. After he missed the 2008 season due to problems with his budget, he moved in 2009 to the Porsche Supercup where he boarded for two race weekends at Tolimit Seyffarth Motorsport . He took that team also participated in the German Porsche Carrera Cup in 2009 and 2010, respectively, where he finished thirteenth and fourteenth in the championship. He also drove in 2010 and 2011 for that team in the ADAC GT Masters , but since he was a guest driver, he was able to score any points.
In 2011 Sigachev also made his debut in the World Touring Car Championship . In the race weekend at the Circuit Ricardo Tormo Valencia he got into a BMW 320 TC for DeTeam KK Motorsport . He finished the race in eighteenth and thirteenth, which he managed to score points.