In 2009, Stiefel created a new staging of The Nutcracker for the UNCSA, which continues to be performed every Christmas season.
He then choreographed a comedic one-act ballet entitled Bier Halle and collaborated with Johan Kobborg on choreographing and producing a new production of Giselle for the RNZB. In 2013, Giselle was adapted into a feature film, directed by Toa Fraser, and was selected for screening in the NZ International Film Festival, Vancouver International Film Festival, and the Toronto International Film Festival. Giselle was recently restaged and performed at the Opera National Bucharest.
Stiefel was the choreographer for Flesh and Bone, a limited edition television series for STARZ network that was nominated for two Golden Globes.
On October 19th, 2015, he choreographed a special performance at the Brooklyn Academy of Music featuring Jimmy Kimmel, Guillermo, Misty Copeland, and fifteen American Ballet Theatre dancers.
In Aoril 2016, ABT's Studio Company performed Ethan's piece Knightlife at the Joyce Theater.
In May 2017, the Washington Ballet performed Frontier, a new one-act work choreographed by Ethan and inspired by John F. Kennedy and his commitment to the space program.
In June 2017, he was invited to participate in UNCSA's inaugural choreographic institute.
He also starred in the feature film Center Stage, and returned to play the role of Cooper Nielsen in Center Stage 2-Turn It Up and Center Stage 3. Stiefel’s television and video credits include The Dream, Le Corsaire, Die Fledermaus, Gossip Girl, and the documentary, Born to be Wild.