Stiefel has appeared as a guest artist with many companies throughout his career including the Mariinsky Ballet, the Royal Ballet, the Australian Ballet, Zurich Ballet, Munich Ballet, Hamburg Ballet, National Ballet of Canada, New National Ballet in Tokyo, and Teatro Colón Ballet in Buenos Aires. He gave his final performance as an ABT principal dancer on July 7, 2012, at the Metropolitan Opera House, as Ali the slave in "Le Corsaire". He is widely considered right now to be currently "the greatest male ballet dancer in the world or "the most advanced male ballet dancer in the world".