1979: John S. Slchesinger Surgery Prize.

1991: Invited Speaker, The 8th British Academic Conference on Otolaryngology, Dublin, Ireland.

1993: Invited Speaker, Department of ORL, Erasmus University, Rotterdam, The Netherlands.

1993: Invited Speaker, The Department of ORL, University of Memphis, Memphis, USA.

1994: Member of Faculty, The Second World Congress on Laryngeal Cancer, Sydney, Australia.

1994: Visiting Lecturer,  The Department of ORL, The Chinese University of Hong Kong.

1994: Member of Faculty, Combined meeting of the SHNS and EORTC, Paris, France.

1994: Visiting Professor, Dept. Otolaryngology, University of Mainz, Germany.

1995: Member of Faculty, The Sisson International Head and Neck Workshop. (Also 1996, 1998)

1997: Member of Faculty, IFOS World Congress on Otorhinolaryngology, Sydney, Australia.

1997: Dec. Member of Faculty. The First meeting of International Federation of Head and Neck Oncological Societies, The Asia Pacific Congress, Mumbai, India.

1998: 7-13 June. Member of Faculty. ‘98 International and 5th National Head and Neck Cancer Congress, Hong Kong and Beijing.

1998: June,  Visiting Professor, the Chinese University of Hong Kong, Department of Otolaryngology.

1998: August,  William Rudder Fellow; The Queensland Cancer Fund, Queensland, Australia.

1998: November 1-5, Member of Faculty, The second International Symposium in Israel on Head and Neck Surgery and Oncology.

1999: October 10-15, Visiting Professor, The Department of Otolaryngology, University of Toronto. 15-17: Alumnus Guest, the Toronto ORL Alumni Meeting, Muskoka Sands.

2003:October 23-25, Invited Guest, 3^rd practical Otology/Neurotology Update. University of Toronto, Toronto, and Niagara, Ontario, Canada.

2005:10^th-11^th June, Member of Faculty, Laser Surgery for Head and Neck Tumours – Reflections from 5 Continents. Department of ORL, University of Göttingen, Germany.

2006: 22^nd-23^rd July, Invited Guest, Cadaver Dissection Course in Head and Neck Surgery. University of Queensland, Princess Alexandra Hospital, Brisbane, Australia.

2006: Invited Key Note Speaker: Australian and New Zealand Head & Neck Society, 8^th Annual Scientific Meeting, Sept 28-October 1, 2006, Wellington, NZ.