after suffering a hip injury in 1988, andersen returned to the stage but eventually decided to retire from new york city ballet in 1990. he then began a second career as a guest ballet master for companies around the world, staging works by balanchine, bournonville, robbins, and others. as a "répétiteur" for the george balanchine trust, an organization formed to oversee the licensing and production of balanchine works, he is one of a select group of dancers permitted to stage ballets by the great master. since 1987, he has also been in demand as a guest choreographer, staging works of his own in many countries.