After that he joined Chakuriki Gym in 2010, trained by Thom Harinck alongside Le Banner, Braddock Silva, Peter Aerts and Hesdy Gerges he faced some top fighters.
[2] He was Spanish Muay thai professional champion, in 2010 he fought Brice Guidon for his WPMF European Heavyweight Muaythai title and lost the fight by split decision.
In the same year he became Amsterdam fight club heavyweight tournament champion defeating Slovenian Jasmin Bečirović and Thiago Martina in the final.
[4][5] Then he fought Steve McKinnon for WBC Muaythai Super Cruiserweight World title and surprisingly lost the fight in the first round by overhand right knockout after only 16 seconds.
[8] He was late replacement in a non-tournament bout at the K-1 World Grand Prix FINAL in Zagreb on March 15, 2013 and he lost to Mladen Brestovac via unanimous decision .
During his university internship in Chicago, he was hired as a professional sparring partner and standout strategy coach by Ultimate Fighting Championship champion Daniel Cormier.
The Swedish UFC greatest fighter of all time, Alexander Gustafsson, also hired Frank Munoz as a sparring partner and standout coach specialist at All Stars Gym Stockholm.
[20] On April 17, 2014 Frank Muñoz was awarded in Menorca at the I Gala de l'es port menorqui with the Gold distinction as outstanding athlete 2013.