Singh was awarded Humbold Fellow in
Stuttgart University from 1979 to 1981. Between 1981 and 1985 he was a Research Associate and Lecturer at
McGill University. From 1982 to 1983 he worked in High Magnetic Field Lab,
Université Paul Sabatier as a visiting scientist. He also worked as Research Associate at
University of North Carolina. His visiting positions include Texas Center for Superconductivity (1992),
University of Oxford (1993-1994), and Dubna and Ioffe Institute Saint Petersburg (2019). ==Research==