Marc is extensively involved in DLA Piper's national signature projects, including Advancing Education's Promise, a pro bono project dedicated to improve educational pathways for children. As part of Serving Those Who Serve Our Country, a multi-faceted pro bono project serving veterans and their families, Marc represents a veteran before the Department of Veterans Affairs, Board of Veterans' Appeals.

Through Volunteer Lawyers for the Arts, Marc has represented and counselled artists, including successfully negotiating the settlement of a dispute between a New York artist and a gallery.

Marc received a Pro Bono Publico Award from The Legal Aid Society in 2013 for his work on Legal Aid’s amicus brief to the New York Court of Appeals in People v. Dunbar, arguing that the Queen's County District Attorney's practice of interviewing was unconstitutional.