 He also served as the chairman of the State Trading Corporation and Punjab National Bank and is credited with earning distinction as a CEO who for his systems, efficiency and honesty in running PSU's.In 1974 Reserve Bank of India constituted a study group headed by Shri Prakash Tandon, the then Chairman of Punjab National Bank, with a view to study the entire gamut of Bank's finance for working capital and suggest ways for optimum utilisation of Bank credit.This was the first elaborate attempt by the central bank to organise the Bank credit.