Prior to joining the Bar of England, he was a Consultant on international legal matters to Mishcon de Reya Solicitors in London. He originally was admitted to the Bar of Nepal in 1981 and practised there both as an Advocate and as a government lawyer during which he served as legal adviser to the Ministry of Foreign Affairs and to the Ministry of Commerce and Under-Secretary in the Ministry of Law and Justice. He has worked at the UN in New York as a Nepalese delegate.
He has been Professor of International Law since 1999 - first at the University of Hull and since 2004 at the University of Leeds. He is one of those rare academics who rose from a Lecturer to Professor in British academia within a matter of mere six years. He also is one of those rare lawyers who has received royal honours from the monarchs of two countries for his services to international law: Her Majesty the Queen of the UK appointed him an OBE - Officer of the Most Excellent Order of the British Empire - in 2004 and His late Majesty King Birendra of Nepal honoured him by the Order of Suprabal Gorkha Daxinbahu in 1998.