Career
In 1964 he took part only in mixed dressage events and finished fifth with the Swedish team As an United States Equestrian Team coach, Ljungquist guided the United States dressage team to a bronze medal at the 1976 Summer Olympics and a gold medal at the 1975 Pan American Games. He was inducted into the United States Dressage Federation Hall of Fame in 1998.
He died in Sweden while on a visit from the United States.