Jim Hartung competed for the University of Nebraska, helping them to four consecutive NCAA team titles (1979-82), while winning the all-around in 1980 and 1981. He also won seven NCAA titles from 1980-82, earned 22 All-American honors, and won the Nissen-Emery Award in 1982 as the nation’s top male gymnast. At the US Nationals, Hartung won the all-around in 1981 and won 12 apparatus titles between 1978 and 1982. He made the 1980 US Olympic team which did not compete because of the boycott. At the 1984 Olympics he helped the US to the men’s team title.
Hartung later returned to the University of Nebraska as an assistant coach from 2006-25, and also became a brevet level judge in the US. He was a member of the inaugural Nebraska Athletics Hall of Fame class in 2015, the USA Gymnastics Hall of Fame in 1984 (team) and 1997 (individual), the Omaha Sports Hall of Fame, and was a part of the first College Gymnastics Association Hall of Fame class in 2024.