Kester has been a practicing Naturopath and Western Herbalist since 1996 and an Ayurvedic Practitioner since 2001. He has studied Ayurvedic Medicine through the American Institute of Vedic Studies (Dr Frawley), the Australasian Institute of Ayurvedic Studies (Dr Ajit) and Equals International. He spent six months gaining clinical experience at the Ayurvedic Research Institute and with Private Doctors in Pune, India and spent several years studying pulse and prescribing with Ayushakti Ayurveda (Dr Smita Naram). Kester has also been a formal Zen student since 2008 and was ordained as a Zen Buddhist Monk in 2012.

He has run his own health practice for over 25 years and, since 2008, has been Co-Director of the Mudita Institute, an  education and training organisation based in the Byron Shire, Northern NSW. The Mudita Institute specialises in teaching the ancient wisdom of Ayurvedic Medicine and Buddhist Psychology in a way that is easy to understand and apply in our modern lives.