Hasher completed his undergraduate training in India before moving to the UK for further training in anaesthesia. He later moved to Australia and completed his anaesthesia training, attaining his FANZCA in 2009.
After extensive training in pain medicine in Auckland, Sydney and Newcastle, Hasher gained his FFPMANZCA pain management fellowship in 2015.
Hasher works in a variety of public and private hospitals in anaesthesia and pain medicine in Sydney and on the Central Coast. He treats a wide range of pain conditions, including neuropathic pain and complex regional pain syndrome. He is committed to delivering a multidisciplinary, team-based approach to pain management, and also has expertise in interventional procedures, including spinal cord stimulators.