Christopher Markus, along with Stephen McFeely, wrote the screenplay for Captain America: The First Avenger, Thor: The Dark World, Captain America: The Winter Soldier, Captain America: Civil War, Avengers: Infinity War. and the untitled Avengers sequel.
He also portrayed S.H.I.E.L.D. Interrogator #1 in Captain America: The Winter Soldier.
He was interviewed for the documentaries Marvel Studios: Assembling a Universe, Captain America: 75 Heroic Years and United We Stand, Divided We Fall: The Making of Captain America: Civil War.
- Together with Stephen McFeely, he was nominated for a Saturn Award for Best Writing for his work on Captain America: The Winter Soldier.
- Christopher Markus often works with his writing partner Stephen McFeely.