Andrew's first feature, Bokeh, an Iceland-set cerebral sci-fi film starring Maika Monroe (It Follows, The Guest) and Matt O'Leary (The Lone Ranger, Brick) which he co-wrote and co-directed was selected for IFP's Independent Filmmaker Labs. It premiered at the 2017 Santa Barbara International Film Festival. The film was acquired by Screen Media Films. Netflix bought the exclusive, worldwide rights, and the film was released theatrically March 2017.

The Village Voice called Bokeh, "Witty and Beautiful." The Los Angeles Times said, "An existential mystery in the admirably stripped-down Bokeh, a sci-fi drama without all the explanatory "sci." The Verge said, "A gorgeous indie science fiction film explores the quietest apocalypse." The Chicago Tribune said, "Bokeh turns the notion of the apocalypse into a philosophical exploration of the meaning of life." Film School Rejects said, "Bokeh Is devastatingly beautiful and beautifully devastating" The New York Observer said, "The writing and co-direction, by the team of Geoffrey Orthwein and Andrew Sullivan, is so careful and revelatory that the viewer shares in every scene." and Rogerebert.com said, "Bokeh is intimate, expansive storytelling."

Andrew's second feature, I Don't Want To Drink Your Blood Anymore goes into production, March 2022.