After the war, Grandmaster Park dedicated his life to promoting and spreading Taekwon-Do worldwide. He was one of the original twelve masters certified upon the establishment of the Korea Taekwon-Do Association—the first official organization for this martial art. He also co-authored the original Taekwon-Do patterns (forms).
Grandmaster Park played a pivotal role in introducing Taekwon-Do to countries including China, Czechoslovakia, Bulgaria, Poland, Hungary, North Korea, Japan, and Russia.
He founded:
- The Taekwon-Do Federation of the USSR
- The Manitoba Taekwon-Do Association (Canada)
His mission was especially significant in nations with deeply rooted martial traditions. For example:
- In 1970, he first introduced Taekwon-Do to Vietnam—a country with its own indigenous martial art, Vovinam (Viet Vo Dao).
- In 1980, as a native of South Korea, he traveled to North Korea to develop Taekwon-Do there.
- From 1982 to 1984, he taught Taekwon-Do in Japan, a country renowned for its rich martial arts heritage.
- In 1988, he went to China with the same purpose.
- In March 1989, despite the official ban on martial arts in the USSR, he arrived in Moscow and helped organize and conduct the country’s first Taekwon-Do seminar.