Mardani won the silver medal in the men's heavyweight class at the 2013 World Taekwondo Championships held in Puebla, Mexico. He also won a bronze medal at 2022 Guadalajara as well as a gold medal in 2021 Asian Championships in Beirut. Mardani has also been on the world's top 5 (+ 80 kg) taekwondo weights since 2013, always and annually.