- Association of Radiation Oncologists, India
- Indian Association of Medical Oncology, India
- Indian Society of Oncology, India.
- Indian Association of Immunologists, India.
- Indian Association of Cytologists, India.
- Indian Association of Hyperthermic Oncology & Medicine, India.
- Association of Medical Physicists of India.
- Indian Medical Association
- Indian Society for Radiation Biology
- Indian Society for Head & Neck Oncology
- Indian Society of Cancer
- Association of Health Administration
- Association of British Scholars
- Indian Brachytherapy Society
- Indian Nuclear Society
- Indian College of Radiation Oncology (ICRO)
- Association of Therapeutic Radiation Oncologists of America (ASTRO), USA
- Radiation Research Society, USA.
- North American Hyperthermia Group, USA. (Past)
- European Association of Hyperthermia (ESHO)
- New York Academy of Sciences.
- Asian Association of Radiation Research.
- International Clinical Hyperthermia Society.
- Asian Society of Hyperthermia and Oncology (ASHO)
Executive Posts on different groups
- Founder Member, Society for Cancer Research and Communication.
- Member, Licensing and Appellate Committee for Radiation Protection of Atomic Energy Regulatory Board, 1989-1993
- Treasurer, Society of Health Professionals (India) for Health and Human Rights (Past)
- President, Society for the Right to Die with Dignity
- President, Indian Association of Hyperthermic Oncology and Medicine
- Member – Adhoc committee to discuss the effects of Chernobyl – Russia. (past).
- President, Association of Radiation Oncologists of India – Maharashtra State Chapter from 1995-2001.
- Member of executive council of Indian Association of chemotherapists now named Medical Oncologists for two terms.
- Joint Secretary Indian Society of Oncology (ISO).
- Member of Indian Society of Health Administrators, (ISHA).
- Member of Indian Nuclear Society
- Member of Indian Brachytherapy Society, Chennai.
- Member of Advisory Committee of Indian College of Radiation Oncology, AROI
- President of ICHS International Clinical Hyperthermia Society, USA
- Vice President, Asian Society of Hyperthermia and Oncology 2009 onwards, Japan
- Vice President, Indian Association of Radiation Biology, 2011 onwards
- Life member of Indian Medical Association
- Member of Governing Council - Pushpagiri Institute of medical Sciences and Research Centre, Thiruvalla 689109, Kerala, India.
- Working Trustee – Indore Cancer Foundation, Indore, India.
- President of Society for Radiation Research (SRR)
Editor/on Editorial board
- Editor – On Line with Radiation Oncology, an AROI newsletter (2001-2002).
- Editor – Newsletter, Indian Association of Hyperthermia & Medicine
- Editor of National Breast Foundation Newsletter.
- Editors – National Member of Journal of Clinical Radiotherapy and Oncology (The official publication of the Association of Radiation Oncologists of India) (past).
- Editor-in-Chief, Journal of Cancer Research and Therapeutic – JCRT, peer reviewed indexed Journal by Medknow Publications
- Member, Editorial Board, International Journal of Hyperthermia
- Member, Editorial Board, Indian Journal of Cancer – Medknow Publications
- Member, Editorial Board, Indian Journal of Head and Neck Cancer
- Member, Editorial Board, International Journal of Hyperthermia informa publication U S A.– official Journal of ASHO, ESHO & NAHO.