Waysun Johnny Tsai
Author

Waysun Johnny Tsai

Founder, C.U.M.A. Survival School & Combatives / Instructor / Author / Knife Designer
Chicago native Sijo Waysun Johnny Tsai is the founder of the C.U.M.A. Survival School and C.U.M.A. Combatives. He is a freelance writer, published book author, and a DVD personality. Sijo is also an established knife designer for several well-known companies. Holding two internationally recognized eighth-degree black sashes (black belts), Sijo Tsai is a high-demand instructor with over 40 combined years of teaching experience in practical street defense, urban and wilderness survival, active-shooter training for school districts and municipalities, and combatives for civilians, law enforcement, and military agencies.
urban and wilderness survivalcombativesstreet self-defenseactive-shooter trainingknife design

Chicago native Sijo Waysun Johnny Tsai is the founder of the C.U.M.A. Survival School and C.U.M.A. Combatives. He is a freelance writer, published book author, and a DVD personality. Sijo is also an established knife designer for several well-known companies. Holding two internationally recognized eighth-degree black sashes (black belts), Sijo Tsai is a high-demand instructor with over 40 combined years of teaching experience in practical street defense, urban and wilderness survival, active-shooter training for school districts and municipalities, and combatives for civilians, law enforcement, and military agencies.

To top