1. Chairman of Department of Plastic&Aesthetic Surgery of Pham Ngoc Thach Medical University of Ho Chi Minh City, Vietnam. 2. Professor of Department of Plastic and Aesthetic Surgery, Cho Ray Hospital, Vietnam 3. Director of Le Hanh Center of Cosmetic&Plastic Surgery 4. President of Ho chi Minh City Society of Plastic and Aesthetic Surgery. 1978 Medical Doctor , University of Medicine and Pharmacy of HOCHIMINH City. 1992 A.F.S.A. Attestation de Formation Specialisée Approfondie en Chirurgie Plastique) Faculty of Medicine of Marseille II , FRANCE. 1996 Doctor of Philosophy in Medicine in Head and Neck Surgery, University of Medicine and Pharmacy of Ho chi Minh City, Vietnam. 1996 Clinical Assistant Professor in Department of ORL, Head and Neck Surgery and Microsurgery. University of Texas, Medical Branch at Galveston, USA. 2011National Associate Professor of Vietnam.