Lynn Hirshfield has joined Participant Productions as Vice President of Business Development, it was announced today by Ricky Strauss, the President of the L.A. based production company announced Tuesday. Hirshfield will report to Participant heads of marketing Buffy Shutt and Kathy Jones and will lead the development of strategic marketing partnerships and integrate these partners into social action and advocacy campaigns. In addition, part of Lynn's duties at Participant will be to launch a publishing division to support the company's films and social action campaigns. Throughout 2006, she consulted for Participant Productions on the social marketing and outreach for the Academy Award winning documentary "An Inconvenient Truth." Upcoming releases include Mike Nichols' "Charlie Wilson's War," starring Tom Hanks, Julia Roberts and Phillip Seymour Hoffman. [Brian Brooks]