His films include Old Joy (2006), Paranoid Park (2007), Green Room (2015), I Don't Feel at Home in This World Anymore (2017), and Showing Up (2022).
After reading the film's script, he came aboard the project in part due to his familiarity with the story's locations, describing Mount Hood and the Bagby Hot Springs area as his "stomping grounds".
Additionally Kopp produced Reichardt's 2013 film Night Moves; Certain Women (2016); First Cow (2019); and, most recently, Showing Up (2022).
His other work as a producer includes Macon Blair's I Don't Feel at Home In This World Anymore (2017); Ritesh Batra’s Photograph (2019); and three films by Jeremy Saulnier--Green Room (2015); Hold the Dark (2018) and the upcoming Rebel Ridge.
His films have been nominated for numerous Independent Spirit Awards, and they've screened at festivals around the world, including Cannes, Berlinale, Venice, Toronto, Sundance and Telluride.