Boris Romanovich Rotenberg Boris Romanovich Rotenberg Boris Romanovich Rotenberg (, born in Leningrad on 3 January 1957) is a Russian business man and oligarch. He is co-owner (with his brother Arkady Rotenberg) of the SGM (StroyGazMontazh) group, the largest construction company for gas pipelines and electrical power supply lines in Russia. He was listed by Forbes as Russia's 69th wealthiest person in 2016 with a net worth of $1.07 billion. He is considered a close confidant of president Vladimir Putin. Rotenberg was very involved in martial arts between 1968 and 1978, particularly judo. He trained alongside Vladimir Putin and won several awards for
Igor Rotenberg Organizational Structures. Since 2006, he is the owner and the Chairman of the Board of Directors of the Moscow-based NPV Engineering Group. Since 2008, he is the Vice-President of the design bureau CB "Northern Sea Route" (). Since 2010, he is the Chairman of the Board of Directors of Mosenergo Heat and Power Company. Since 2011, he is the Chairman of the Board of Directors of (Burgaz). In 2015, Arkady Rotenberg sold his son Igor Rotenberg a number of assets including up to 79% of Gazprom Drilling (Bureniye), 28% of the road contruction company Mostotrest, and 33.3% of Jersey-based TPS