He quickly saw results during his first year officially competing for Chile, earning a silver medal from the Pan American Championships and a bronze medal from the World Championships. In 2018, Acosta was granted Chilean citizenship. During the year, he went on to win a bronze medal at the Pan American Championships, a gold medal at the South American Games, and placed eighth at the World Championships. In 2019 he earned a bronze at the Pan American Championships and competed at multiple Grand Prix around Europe. In 2020, he won the Pan American Wrestling Olympic Qualification Tournament and earned a spot at the 2020 Summer Olympics. He competed in the men's 130 kg event.