Along with Russ Gage, David Weissman was the co-founder, and for 10 years, co-programmer of QDoc, The Portland Queer Documentary Film Festival.

QDoc is the only festival in the entire world devoted exclusively to Lesbian Gay Bisexual Transgender (LGBT) documentaries.

Since 2007 QDoc has shown award-winning films fresh from Sundance, Berlin, Hot Docs, Tribeca, Amsterdam and other top-tier festivals. We have shown historical films, personal stories, artist biographies, experimental work and topical films dealing with current controversies. Visiting artists have included prominent film makers from all over the U.S. and from as far as Italy and Australia, who have participated in lively discussions after the screenings. We have hosted emerging filmmakers as well as 3 Academy Award winning directors, enabling dynamic audience interaction with artists.

In 2017, co-directorship of QDoc was passed into the hands of Deb Kemp and Molly King, and is flourishing under their leadership.