S.J. Langer is a writer and psychotherapist. He also provides clinical supervision and WPATH GEI Certified Mentorship. He is on faculty at School of Visual Arts in the MPS Art Therapy and Humanities & Sciences departments. His research lab studies trans phantoms. He is part of the Faculty for the Diploma in Psychotherapy and Mental Health in Sexual Diversity of Gender at Universidad Diego Portales - CEPPS in Santiago, Chile. One of his articles, Trans Bodies and the Failure of Mirrors, was the winner of the Symonds Prize (Studies in Gender and Sexuality). He has chapters in multiple edited volumes. His first book Theorizing Transgender Identity for Clinical Practice: A New Model for Understanding Gender was a finalist for the Lambda Literary Award.