Director of High Performance
2009 Top Korean Team Jr Eddie Herr/Orange Bowl Coach
2010 WTA Traveling coach experience
2011 WTA French Open experience
2011 Top Korean Team Jr Eddie Herr/Orange Bowl Coach (Chung Hyeon)
2012 Top Korean ATP Player coaching experience
2010-2012 Middle States Girl’s 12’s #1 Coach
2008-2009 Celsius Tennis Academy Coach in Florida
2011-2013 Ivan Lendl Tennis Academy Scouting Coach
2011-2014 Kim Young Hong Tennis Academy International Traveling Coach
2013 Hansol Traveling Coach (Davis Cup members Lim Yong Kyu, Jeong Suk Young)
2013 Coached Junior ITF #25 Kim Young Seok for pro debut
2015 Inventor and Author of Road to Pro Tennis Swing Training System
2016 Author of book Art of War: Art of Tennis
2017 ATP #29 and Nextgen Champion Hyeon Chung Traveling Coach
2018 SoCal Girls 10s #1 coach (Amy Lee)
2018 #1 Youtube Channel for Tennis in Korea RTPTennis[하늘쌤테니스꿀팁]
2018 Inventor of the revolutionary racket dampener Shocksorb World's Best Racket Dampener using patented shock and vibration-absorbing material.
2019 Took a step further in softening the stringbed by releasing Shocksorb UltraSoft Racket Dampener which absorbs a wider range of frequencies of harmful vibrations on ball impact helping thousands of players, especially at colder temperature when the ball is harder due to the temperature and cause more shock to the arms.
2020 Inventor of Heel Pad XC. An athletic heel pad that is installed underneath the original shoe liner using a material (Sorbothane) that can absorb up to 94.7% of impact shock. Helping thousands of recreational and professional players reduce joint pain.
Former full scholarship IMG Academy student and former hitting partner of Tommy Haas, Max Mirnyi, Parul-Henri Mathieu, Xavier Malisse, Hugo Armando, Maria Sharapova, Jalena Jankovic, Daniella Hantuchova, Mariana Lucic, Venus and Serena Williams, Monica Seles, Alexandra Stevenson, Tatiana Golovin, and etc.
Multiple students accepted into Division I colleges and Ivy Leagues in the States.