taught in numerous theatre programs including Pace University/Actors Studio; Vassar College; SUNY Purchase; The O’Neill Theatre Center; Columbia University; Ohio University, Dartmouth College, Trinity Repertory Theatre / Conservatory (Anne Bogart, Artistic Director); Hunter College, The New Actors Workshop, American Conservatory Theater, University of California: Santa Cruz, University of Pittsburgh, University of South Carolina, University of Missouri-Kansas City and Shakespeare & Company. His innovative approach to phonetics and stage accents is used in dozens of training programs. Louis has acted with Shakespeare & Company, American Shakespeare Theatre and New York Shakespeare Festival. He has written several influential texts on Voice, Speech and Shakespeare Performance: The Joy of Phonetics and Accents; Bringing Speech to Life; How to Speak Shakespeare, Shakespeare's Names: A New Pronouncing Dictionary. He is a member of Actors' Equity Association (AEA), Screen Actors Guild (SAG) and The Players.