Boxcar Films is the production company of Brock Williams, an Academy Shortlisted and Independent Spirit Award-nominated producer working in both documentary and scripted films. Williams was a Film Independent Producing Lab fellow in 2014 and is currently a 'producer in residence' for Film Independent.

Williams has produced, line produced or EP'd critically-acclaimed feature documentaries such as The Body Politic (2024), There Was, There Was Not (2024), Indigo Girls: It's Only Life After All (2023), On Her Shoulders (2018) and Killing Them Safely (2015), as well as scripted films including Memes & Nightmares (2024), 

Good Girl Jane (2022), Slash (2016), Awful Nice (2013) and You're Next (2013).

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