sentences:  From 1982 to 1991 he was an assistant professor at Columbia University in New York.From 1992 to 2006 he was a faculty member at the Public Health Research Institute in New York where he led a U.S. government-funded study "Structure and Function of RNA Polymerase in "E. coli"" with a total budget of $7 million.He also directed the project "Treating Multi-drug-resistant tuberculosis in Siberian Prisons" funded by a $13 million grant from philanthropist George Soros.