He won the bronze medal at the 2020 Olympic Games and the 2022 World Championships, in addition to being three-time Pan American Judo champion.

He began to stand out and, at the age of 13, he received an invitation from coach Antônio Carlos Pereira, known as Kiko, to join the Sogipa team.

But it was in 2017, after winning the 2017 World Judo Juniors Championships in Zagreb and becoming champion of the Olympic Trials, that Cargnin established himself in the main team, at the age of 20.

[15][16] In 2023, Cargnin reached his third individual title at the Pan American Championship and also won a gold medal in the Brazil's mixed team, and at the Pan American Games, he reached the final, but due to a physical injury, he had to abandon the final, leaving the gold to his fellow compatriot Gabriel Falcão, ensuring, however, a place for the 2024 Olympic Games.

[19][20] At the 2024 Pan American-Oceania Judo Championships, held in Rio de Janeiro, Cargnin reached the final, where, in a controversial fight, where the referee did not give several blows applied by the Brazilian to the Canadian Arthur Margelidon, and also stopped applying shidos to the Canadian, the Brazilian ended up with silver.

[21][22] At the 2024 Judo World Championships, Cargnin reached the bronze medal match, but finished in 5th place in the competition.