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
Rotenberg (hills) the north, Herzberg am Harz to the northeast, Bad Lauterberg to the east, Duderstadt to the south, Göttingen to the southwest and Northeim to the northwest. According to the official classification of natural regions of Germany the ridge belongs to the landscape unit of the Eichsfeld Basin in the Weser-Leine Uplands. The Rotenberg is surrounded by the following other ranges: the Harz Mountains to the north and, somewhat further away, the Ohm Hills to the southeast and the Göttingen Forest to the southwest. The Rotenberg hills lie on the watershed between the Oder and Beber rivers in the north and