Graham Yost began writing for television in 1989 on the Nickelodeon series HEY DUDE. After a brief stint on FULL HOUSE his script for SPEED was picked up by Paramount (it was later produced by 20th Century Fox). His other feature film credits include BROKEN ARROW, HARD RAIN, MISSION TO MARS, and THE LAST CASTLE.

Yost was nominated for an Emmy as a writer for the HBO miniseries FROM THE EARTH TO THE MOON, and won Emmy and Golden Globe Awards for it as a producer. He later wrote/co-wrote two installments of the Golden Globe and Emmy Award-winning HBO WWII miniseries BAND OF BROTHERS, and won an Emmy Award for THE PACIFIC, HBO’s epic miniseries following three Marines through the Pacific theater of World War II. In 2002, Yost created BOOMTOWN for NBC, which was honored with a Peabody Award and two Television Critics Association awards. In 2006, Yost created RAINES starring Jeff Goldblum for NBC.

Yost was the showrunner on JUSTIFIED, the Emmy winning FX series starring Timothy Olyphant, based on a character created by America’s preeminent crime novelist Elmore Leonard. He also served as an Executive Producer on the Emmy-winning FX series THE AMERICANS, and was the showrunner and executive producer on seasons one and two of Amazon's SNEAKY PETE. Since 2019, Yost has been with AppleTV+. Along with producing SLOW HORSES, Yost is Executive Producing and showrunning SILO, based on Hugh Howey’s Silo series of novels.