Education
He joined the Bolsheviks during his years as a student in the medical faculty of Kiev University, from which he graduated in 1916. He was immediately drafted into the army, where he served as a doctor and became prominent in the clandestine military organizations of the Bolsheviks.
Career
Instead, he was made chairman of the Mossukno state textile trust, and the following May he left on a tour of Germany, France, and the United States to acquire technical information. On August 27, 1925 he died in a boating accident on Long Lake (New York) along with Isay Khurgin, the first head of Amtorg Trading Corporation.
Membership
At the time of the October Revolution he was a member of the Military Revolutionary Committee of the Petrograd Soviet. On meeting him in November, Leon Trotsky was so impressed with his "great creative élan combined with concentrated attention to detail" that he appointed him his deputy on the Revolutionary Military Council, where he served with distinction during the Russian Civil War (1918-1920) and helped improve the fighting condition of the Red Army—Trotsky called him the Carnot of the Russian Revolution.