 His work on reservation for backward classes and minorities has led to him to conclude that the fundamental rights mentioned in the Constitution should be interpreted in an Indian context, which means that a betterment of the society has to be brought about in terms of understanding and improving the Indian ways of life, rather than attempting their surgical replacement.Professor Singh has been a fellow and visiting professor at several institutions and universities of international repute.In 1985 he was designated as the Professor of Law at Faculty of Law, University of Delhi.