Guenter Seidel, a German native, was born in Fischen im Allgäu, Bayern, Germany and moved to the U.S. in 1985. Guenter quickly made an impact on U.S. dressage. Seidel aided the U.S. in winning the Team Bronze medal at three consecutive Olympic Games with different horses: at the 1996 Atlanta Games with Graf George, the 2000 Sydney Games with Foltaire, and the 2004 Athens Games with Aragon.
He was a member of the U.S. Silver medal-winning team at the 2002 FEI World Equestrian Games in Spain. The United States Equestrian Team (USET) also awarded him the Whitney Stone Cup as the individual who achieved a distinguished record in international competition while also serving as an ambassador for the USET and equestrian sports.
In 2006, he helped the U.S. win a Team Bronze medal at the FEI World Equestrian Games and was the highest scoring American rider on the first day of competition.
Seidel is very active in the dressage community, training and giving clinics across the country. He also serves on the USEF Dressage Eligible Athlete Committee.