Cohler has created and run various performing/teaching clarinet festivals since 2000 including well-known clarinetists such as Philippe Cuper (Paris Opera), Alessandro Carbonare (Orchestra of St. Cecilia), Ricardo Morales (Philadelphia Orchestra), Paquito D'Rivera, Wenzel Fuchs (Berlin Philharmonic), and Luis Rossi (Chile). These include the International Clarinet Connection (2000, 2001), the International Clarinet and Saxophone Connection (2002), and the International Woodwind Festival (2005, 2007, 2010, 2012). Cohler's clarinet students have won top prizes in the Geneva International Clarinet Competition, the International AudiMozart Competition in Rovereto, Italy, the International Clarinet Association High School Competition, the Boston Woodwind Society's Harold Wright Clarinet Merit Award, and others. Cohler has coached groups that have won prizes in the Fischoff National Chamber Music Competition, the Coleman Chamber Music Competition and the Chamber Music Foundation of New England Competition. Cohler has been an adjudicator for international clarinet and music competitions including the 1st European Clarinet Competition (2010), the Young Artist Competition of the International Clarinet Association (1997, 2009, 2015), and the Canadian National Music Competition. As of 2017, he is a member of the clarinet, chamber music and conducting faculties of the Longy School of Music in Cambridge, Massachusetts since 1998, and the Boston Conservatory at Berklee since 2005. Through 2011, he was also a faculty member of the New England Conservatory Preparatory School in Boston, where in addition to teaching clarinet and chamber music, he was the assistant conductor of the Youth Philharmonic Orchestra. In the early 1990s, Cohler founded the classical music record company Ongaku Records, Inc.