Since 2003, Sergey has been the partner and general director at S.P. Project workshop, which is one of the first architectural workshops in Moscow that along with designing buildings and complexes of varying complexity also specialise in the development of 3D architectural computer graphics. In 2006, the architectural workshop S.P. Project entered the SPEECH Choban & Kuznetsov union, where Sergey Kuznetsov served as managing partner until 2012. In 2012, he accepted the position of Chief Architect of Moscow and the First Deputy of the Moscow committee on architecture and urban development.