Just prior to graduating from the School of the Arts in 2005, Beacham contributed to the independent feature Dog Days of Summer. Beacham's first spec script Killing on Carnival Row was picked up by New Line Cinema in 2005. Characterized as "a dark neo-noir fantasy thriller," the project has alternately been in development with directors Guillermo del Toro and Neil Jordan.
In May 2006, Beacham was hired to write an early draft of the Warner Bros. remake of the 1981 mythology epic Clash of the Titans. His second spec script, an "otherworldly fantasy" titled The Tanglewood, was picked up by Carnival Row producers Arnold Kopelson and Anne Kopelson in 2007.
In 2009, Beacham was reported to be working on the screenplay for the Disney remake of The Black Hole. Plot details of Beacham's script have been kept under wraps, but the new film is said to be more grounded in science.
In 2010, Beacham's treatment for the science fiction film Pacific Rim was acquired by Legendary Pictures. Prior to the film's release in 2013, Beacham authored a graphic novel prequel titled Pacific Rim: Tales From Year Zero 
Pacific Rim: Uprising
The "Pacific Rim sequel" was announced in June 2014, for a brief time, he worked as a co-writer with del Toro on the early script and story treatments for the film with Zak Penn, largely as a consultant. During that time he story the story for the ongoing series-turned-miniseries, Pacific Rim: Tales From The Drift, which was originally intended to act as a tie-in to the sequel, pending a then-April 2017 release. When production was delayed, Beacham moved on to do other projects. The sequel's production was later revamped with Steven S. DeKnight as director with new screenwriters.