Stohn's work in the entertainment industry commenced with part-time appearances as a performing artist, continuing with active work as a songwriter (including two songs that reached the Canadian Top-10, Maybe Your Heart and Once In A Long Time,[5] co-written with Christopher Ward), and a primary career as an entertainment and copyright lawyer since he was called to the Ontario Bar in 1979.

Entitled Whatever It Takes: Life Lessons from Degrassi and Elsewhere in the World of Music and Television, the book has been written by Stohn with Christopher Ward, and includes a foreword by Martin Gero.

[10] In early 2000, Linda Schuyler and Yan Moore were developing a new teen TV series with the working title Ready, Willing and Wired, based on the already success.

[6] From 2004 to 2008 Stohn executive produced the teen drama television series Instant Star about a young woman (played by Alexz Johnson) who wins a singer/songwriter contest.

[12] In 2011 and 2012 he executive produced the television series The L.A. Complex (formerly called Highland Gardens) for Bell Media in Canada and The CW in the U.S., about young Canadians dreaming of fame and fortune while struggling to survive in an apartment-style hotel in Los Angeles.

[16] He has also recorded music as a songwriter and producer for GTA Rhythm Section, an orchestral pop band which Stohn has described as strongly influenced by Brian Wilson and which features Al Jardine's son Matthew on vocals.

[6] He is a founding partner in the Canadian entertainment law firm Stohn Hay Cafazzo Dembroski Richmond LLP, where he provides strategic legal advice to performers, advertising agencies, merchandisers, recording artists, songwriters, multimedia/internet creators, broadcasters and film and television producers.