Tallent finished third in the 20 km walk at the 2008 Olympic Games in Beijing to claim his first Olympic medal. He received a silver medal for finishing second in the 50 km walk a week later, becoming the first Australian to win two athletic medals in the same Olympics since 1972 and the first male Australian to do so in 102 years. In the 20 km walk and 50 km walk at the 2009 World Championships in Athletics, he finished in sixth and seventh position respectively. Tallent returned to the medal dais in 2010 when claiming a bronze medal in the 50 km Walk at the 24th World Race Walking Cup held in Chihuahua, Mexico. Later on that year Tallent took home gold in the 20 km walk at the 2010 Delhi Commonwealth Games.
He opened his 2011 season with a win at the Australian 20 km walk championships, while his wife Claire Tallent secured the women's title. At the 2011 IAAF World Athletics Championships, he won the bronze medal in the Men's 50 km walk.
Born to farming parents in Ballarat, Jared is married to Claire Tallent, who is also an international race walker, having competed at the Olympics and securing silver in the women's 20 km walk at the 2010 Delhi Commonwealth Games. When not competing he is studying for his Bachelor of Business in Financial Planning or working in the banking industry.