Career
In college he excelled in mathematics courses, yet made his career as an important director of India"s railways, applying his mathematical skills there. Upon retirement, he set out in writing several books, starting with, popularizing science and targeting laymen. In 1960, he was appointed director of the Indian Railway Board, and nine years later he was appointed general manager of the Northeast Frontier Railway.
After his retirement he went to work as was managing director of the Indian Drug and Pharmaceuticals, adviser of Asian Development Bank and adviser of Tata Chemicals.
Singh was elected a Fellow of the Royal Statistical Society and awarded an honorary Doctorate in Science by Roorkee University.