In the 2018 European Rowing Championships, Valent competed with his brother Martin in the coxless pair category. They were second best for the first three quarters of the race, before taking over in the last 500 meters and finishing first, with a time of 6:26.42. The two brothers continued competing in the coxless pair in the 2019 European Rowing Championships as well, holding the leading position throughout the race, and finishing first with a time of 6:22.46. He and his brother competed in the coxless pair once again during the 2020 European Rowing Championships, finishing in the second place, behind the Romanian Tudosa/Cozmiuc pair.