- Subspecialised in STEREOTACTIC RADIOSURGERY. Pioneer in Stereotactic Radiosurgery in South Asia, carrying out the first procedure in South Asia in May 1995 at the Apollo Hospitals Madras. Other special areas of interest include Stereotactic Biopsy and Management of Head Trauma.
- Pioneer in introducing telemedicine in India. Invited guest speaker in International Conferences on Telemedicine held at Cairo, Kosovo, Dhaka etc. Have given lectures at national conferences on Medical Informatics, besides being resource person for the MGR Medical University and Pondichery universities for these subjects. First one from India to have participated in multipoint intercontinental telemedicine conferences. Organized teleconferences with New Jersey, Nagoya (Japan), Riyadh, etc. Popularized using video teleconferences for CME programmes in India.
- 32 years of extensive teaching, clinical and operative experience at the Institute of Neurology, Madras Medical College, Stanley Medical College and the Apollo Hospitals and Sundaram Medical Foundations Madras.
- Postgraduate Teacher, question paper setter, examiner and inspector in Neurosurgery for the National Board of Examinations, Govt. of India.
- External overseas examiner for Master’s degree in Neurosurgery - Universiti Sains Malaysia
- First Neurosurgeon in India to get a Ph.D. in Neuroimaging (1990).
- Second Neurosurgeon in India to get the Membership of the National Academy of Medical Sciences in Neurosurgery in 1981.
- Youngest Indian neurosurgeon to have obtained the Fellowship of the American College of Surgeons in 1986.
- Awarded Fellowship of the International College of Surgeons in 1987.
- Presented about 270 papers in National Conferences and 45 in International Conferences.
- Published about 155 papers and several chapters in books.
- Chaired scientific sessions in National and International Conferences.
- Awarded the International College of Surgeons visiting professorship (Indian Section) in 1993 and Kamarakar Oration 1999.
- Formerly member, Neurotraumatology Committee, Neurological Society of India
- Charter member and member Executive committee, Asian Society of Stereotactic and Functional Neurosurgery
- Charter member of the Indian Society of Stereotactic and Functional Neurosurgery
- Formerly Associate Editor, Neurology India and Associate editor of the CME Programme, Neurological Society of India. Formerly Co-Convenor CME programme NSI and Co-Editor Progress in Clinical Neurosciences. Member Editorial Advisory board and referee Neurology India
- Member, Editorial Advisory Committee of Neurosciences Today
- Delivered lectures in Abuja (Nigeria), Acapulco (Mexico) Bangkok, Bahrain, Bali, Baghdad, Beijing, Boston, Brisbane, Chicago, Colombo, Cairo, Canberra, Dhaka, Dubai, Jordan, Hong Kong, Houston, Ibadan, Japan (Nagoya, Sapporo, Karuwasi) Karachi, Kathmandu, Pristhina (Kosovo), Lagos, Lahore, Manila, Marrakech, Muscat, Madrid, Kuala Lumpur, Kota Bharu (Malaysia), New York, New Jersey, Pittsburgh, Riyadh, San Francisco, Seoul, Singapore, Sydney, Shangai and Washington
- Faculty member World Federation of Neurological Sciences Post Graduate course held at Dhaka Bangladesh February 2003 and Riyadh Saudi Arabia 2004
- Certified in Biomedical Communication and Bioinformatics.
- Member Advisory Board Asian Congress of Neurosurgeons / Asian Australasian Society of Neurological Surgery/World Federation of Neurological Sciences. Joint educational neurosurgical programme.