Mr. Mikhelson received his primary degree from the Samara Institute of Civil Engineering in 1977, where he specialized in Industrial Civil Engineering. That same year, Mr. Mikhelson began his career as foreman of a construction and assembling company in Surgut, Tyumen region, where he worked on the construction of the first section of Urengoi-Chelyabinsk gas pipeline. In 1985, Mr. Mikhelson was appointed Chief Engineer of Ryazantruboprovodstroy. In 1987, he became General Director of Kuibishevtruboprovodstroy, which in 1991, was the first company in the region to sell its shares and became private company, AO SNP NOVA. Mr. Mikhelson remained AO SNP NOVAs Managing Director from 1987 through 1994. Subsequently, he became a General Director of the management company «Novafininvest».
Since 2003, Mr. Mikhelson has served as a member of the Board of Directors and Chairman of the Management Board of NOVATEK. From March 2008 to December 2010, he has been a member of the Board of Directors and the Chairman of the Board of Directors of AO Stroytransgas. From 2009 to 2010 he was the Chairman of the Board of Directors of ОАО Yamal LNG and from 2008 to 2011 he was a member of the Board of Directors of OOO Art Finance. From 2011 he is the Chairman of the Board of Directors of PAO SIBUR Holding and from 2011 to 2013 he was a member of the Supervisory Board of the OAO Russian Regional Development Bank. Mr. Mikhelson is the recipient of the Russian Federations Order of the Badge of Honor, the 2 Degree Order of Merit for the Fatherland and the title of honor «Honored man of the gas industry», Medal «for the Arctic preservation» and the First Degree «for development of the energy sector».