He served as Principal Chief General Manager in the Department of non-banking supervision at Reserve Bank of India. Vishwanathan has been an Executive Director at Reserve Bank of India since April 2014.
Vishwanathan, MA (Economics), served as a Director of Punjab National Bank from September 6, 2012, to May 31, 2013. He was also nominee director at Dena Bank Ltd. from May 30, 2011, to September 6, 2012.
He has served as Chief General Manager of Vigilance at IFCI Ltd, Delhi-based government-owned Finance company.