Boxcar Films is the production company of Brock Williams, an Independent Spirit Award-nominated and Academy-shortlisted producer working in both documentary and scripted films. 

Most recently, Williams produced the Hulu Original comedy Memes & Nightmares in partnership with Scheme Engine and LeBron James’ Springhill Company, as well as There Was, There Was Not, a feature documentary about Artsakh from first-time director Emily Mkrtichian. In 2024, Williams had 3 films released, including Alexandria Bombach’s feature documentary Indigo Girls: It’s Only Life After All, feature documentary The Body Politic, and feature drama Good Girl Jane.

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Williams' previous producing credits include feature documentaries On Her Shoulders (2018) and Killing Them Safely (2015) as well as scripted comedies Slash (2016), Awful Nice (2013) and Box Elder (2008), and he was a co-producer on Adam Wingard's You're Next (2011).

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Williams also works as a producer and line producer of commercials, promotional and branded films, and episodic documentary projects.