[6] In Baguio, he began training at Team Lakay Wushu, one of the best MMA stables in the Philippines under famous Filipino coach Mark Sangiao.

Although he earned a bachelor's degree in Criminology, he put his ambitions of pursuing a career in law enforcement on hold to focus full-time on being a professional Martial Artist.

The Ifugao warrior fought Richard Lasprilla for the URCC Flyweight Championship and won via Majority Decision in his first professional MMA fight.

Winning against Nam Jin Jo of South Korea via Unanimous Decision in June 2010[13] and Dalai Bayin of China in round 1 Submission in September 2010.

[14] After his international fights in Hong Kong and Singapore, "The Silencer" returned home to compete at URCC 19: Collision in Pasay, Metro Manila on April 2, 2011, against fellow Filipino Isaac Tulinng.

Belingon also lost his next bout by unanimous decision against Korean Soo Chul Kim,[17] who went on to become the inaugural ONE Bantamweight World Champion two months later.

Belingon followed it up with a pair of first round stoppages of former title contenders Toni Tauru,[24] and Reece McLaren in 2017,[25] before ending the year with a unanimous decision win against Kevin Chung.

[30] Belingon faced reigning bantamweight champion Bibiano Fernandes at ONE Championship 78: Heart of the Lion on November 9, 2018, in a title unification bout and a rematch of their previous battle in 2016.

[31] Belingon won the fight via split decision to become the undisputed bantamweight champion, handing Fernandes his first loss in 8 years and ending the promotion's longest ever championship reign.