Grant S. Johnson is a filmmaker born, raised, and still living in Manhattan, NY. After graduating from Rye Country Day School in 2010, Grant attended Swarthmore College, where he pitched for the baseball team and majored in Art History. His senior thesis was on Jacques Louis David's painting The Death of Socrates (1787). Shortly after  graduating in 2014, Grant met Hunter Ryan and showed him his initial draft of Frat Star. Over the next six months, the two reworked the script, and entered preproduction in August 2015. The film was shot two months later and released by Gravitas Ventures and Netflix in early 2017.

In November 2016, Grant joined John N. Hart Jr., Tommy Mottola, and others as a producer on A Bronx Tale (the Broadway musical), which opened to a great New York Times review. The musical closed its Broadway run on August 5, 2018 and will begin its national tour in September. Grant is also a producer with Hart and others on The Band's Visit (the Broadway musical), which won 10 Tony Awards including Best Musical. 

Grant's current project, Nighthawks, was shot in Fall 2017, where he is the sole writer and director, and producing it alongside Hart, Jeff Sharp, and Peter Pastorelli.

Hart and he are also producing an adaptation of Caroline Elkins' 2006 Pulitzer Prize winning book, Imperial Reckoning.

Pastorelli and he are producing Lee Percy's upcoming film Dreaming American.

Grant was recently hired to produce Shirin Neshat’s first American film Dreamland. Shirin is a renown Iranian visual artist who has made two films, including Women Without Men (2009), which won the Silver Lion at the Venice Film Festival. The script is being written by Jean-Claude Carriere (Belle de Jour, Birth, Goya’s Ghosts, and At Eternity’s Gate). Lina Todd is casting.