Mirza has won multiple Emirati national titles as well as winning the silver medal in the road race at the 2015 Asian Cycling Championships, qualifying him for the 2016 Summer Olympics in Brazil. He was the first Emirati cyclist to compete in the Olympic road race. After his team disbanded at the end of the 2016 season, he joined the team for 2017, becoming the first Emirati to ride for a UCI WorldTeam.