Practicing Tang Soo Do since a young age, he has been actively involved in the art for over 19 years, with 14 of those years spent as an instructor. During this time, he has won multiple Dutch Championship titles in various categories: sparring, forms, weapon forms, and team sparring. Additionally, he has earned European and World titles. He is a member of the Dutch Team and the board of instructors of the NTMB.

He has been teaching for many years at the Tang Soo Do school Shim Kung (Almere) and has been actively serving as the head instructor of Yung Hap since 2020. Since 2021, he has been the proud president of Yung Hap.

Photo: Promoted to 4th Dan by the E.M.T.F. in October 2024.

Has been practicing Tang Soo Do for over twenty-five years, including 15 years as an instructor. He has won multiple Dutch Championship titles, as well as European and World titles under NTMB/ EMTF/ WWTF.

He was a long-time regular member of the Dutch Team. Together, they achieved several international titles. He is now actively serving as the coach of the Dutch selection.

Koert is the founder of Yung Hap and passed the torch to Max in 2021.