Istok is the Founder & Head Instructor of Leto Living, a life style coaching business which aims to address health and wellness in a holistic manner. Istok is a practicing traditional Japanese Martial Artist of Takahashi-ha No Ryu-kyu Shuri-te (karate), and has dedicated over 18 years to his art with more than 10 years as Head Instructor and Sensei of the ACT Dojo. His Martial Arts background has had a profound impact on his life and has inspired him to pursue multiple yet interrelated pathways.

Istok has educational qualifications in Science and Nutrition, and is a member of the Nutrition Society Australia (NSA). As a fully certified fitness professional, he is able to share his passion and philosophies around promoting holistic and well-balanced lifestyle practices, stemming from plant based nutrition and a connection with nature.