Nickolas competed in the
men's featherweight event at the
2019 World Taekwondo Championships held in Manchester, United Kingdom. He was eliminated in his second match. A few months later, he lost his bronze medal match in the
men's 68kg event at the
2019 Pan American Games held in Lima, Peru. In 2021, Nickolas won the gold medal in the men's 80kg at the
Pan American Taekwondo Championships held in Cancún, Mexico. In that same year, he won the gold medal in
his event at the
2021 Junior Pan American Games held in Cali, Colombia. Nickolas won the gold medal in his event at the 2022 Pan American Taekwondo Championships held in Punta Cana, the Dominican Republic. He also competed in the
men's welterweight event at the
2022 World Taekwondo Championships held in Guadalajara, Mexico where he was eliminated in his first match. He won the silver medal in the
men's welterweight event at the
2023 World Taekwondo Championships held in Baku, Azerbaijan. ==Achievements==