Dr Hadi is a versatile person with diverse talents. He is one of the leading authority in the Homoeopathy disciplines having vast experience spanning for almost three decades. Besides being an authority in Homoeopathy and Naturopathy, he is also an established Malay writer having written more than 20 books on various aspects such as health, education, cultural etc. since early '70, in local as well as Malaysian newspapers, journals and magazines.