He began to train under Jack van Hellemond, who had been taught by sensei Ishikawa, the Japanese karate master.

In January 2011, the International Olympic Committee denied Curaçao permission to compete under their own flag,[6] because it was not a fully independent country.

[6] The IOC refused to reconsider their decision, because it would set a precedent, and England wanted to compete separately from the United Kingdom.

[5] Millerson ran as a candidate for the Party for the Restructured Antilles in the 2017 Curaçao general election.

[12] Millerson, suffering from cancer, resigned as president for health reasons on 3 June 2020,[13][14] and was replaced by Ana-Maria Pauletta.