| 1968 | Joined the Foreign Service |
| 1970-72 | Served as Third Secretary and Second Secretary, Embassy of India, Tokyo, Private Secretary to the Ambassador |
| 1972-75 | Under Secretary in-charge of General Administration and Personnel Administration, Ministry of External Affairs, Delhi |
| 1975-76 | First Secretary, Embassy of India, Beirut Head of Chancery & Charge d’Affaires & Deputy High Commissioner, Cyprus |
| 1976-79 | First Secretary, Head of Chancery & Head of the press and Cultural Wing, Embassy of India, Cairo |
| 1979-83 | Consul General of India, Hamburg, with commercial consular Jurisdiction over Bremen Bremerhaven Schleswig-Holstein and lower Saxony |
| 1983-85 | Deputy Chief of Mission, embassy of India, Jakarta |
| 1985-88 | Consul General of India, Karachi, Pakistan |
| 1988-92 | Spokesman of the Foreign Office and Joint Secretary in-charge of External Publicity, New Delhi, India |
| 1992-96 | Ambassador of India, Athens, Greece |
| 1997-2000 | Ambassador of India, Hanoi, Vietnam |
| September 2000 - September 2003 | Ambassador of India, Tokyo, Japan; also concurrently accredited as Ambassador of India to Federal States of Micronesia |
| June 2004 - March 2006 | Professor and Director of Global Security Research Institute, Keio |
| April 2006 - March 2009 | Chairman of the International Advisory Committee, Keio University |
| April 2009 - March 2010 | International Advisor, Keio University |
| Present | Chairman & CEO, India Global Link Co., Ltd. |
| Chairman, Japan-India Partnership Forum |
| Chairman, Sun Link Co. |
| Chairman, Sun and Sands Advisors |
| Chairman, Global Indian International School of Tokyo |
| Visiting Professor, Indian Institute of Technology Bombay |