Grand Master Euna started her Taekwondo journey when she was 6 and has studied Taekwondo for close to 50 years now. She holds certificates in Taekwondo through Kukkiwon, Hapkido through the Korean Ki Do Association Korean Martial Arts, Muay Thai through the World Muay Thai Federation, and Referee Certificate through Chicago Martial Arts Association. Grand Master Euna has won many awards during her time active in the Martial Arts scene in both Taekwondo and Hapkido, and has coached students in Taekwondo, Hapkido, and Muay Thai. She is currently on the board for the Korean Taekwondo Association, Chicago Martial Arts Association, and is a current member of Kukkiwon.

Master Martin is a 4th Dan Black Belt who has experienced the journey to black belt with Yong In Martial Arts since he was 6 years old. With close to 20 years of training in Taekwondo, 10 years in teaching, and 5 years in Hapkido, Master Martin's experience is constant. He has competed and won many medals, trophies, and awards for Sparring and Demonstration techniques, and currently coaches and leads as a referee in competitions. His passion for taekwondo has led him to continue to teach other students, what it means to be a black belt.

Master Jenny started Taekwondo at 3 years old, and received her first black belt at 8 years old. With more than 7 years of teaching experience and over 15 years of training, she is currently the administrative manager and head master along with Master Martin at Yong In Martial Arts.