He wrote the screenplay for Captain America: The First Avenger, Thor: The Dark World, Captain America: The Winter Soldier, Captain America: Civil War and Avengers: Infinity War. He also portrayed a S.H.I.E.L.D. Interrogator in Captain America: The Winter Soldier.
He served as an executive producer on Agent Carter and wrote an episode.
- Wrote films such as The Life and Death of Peter Sellers, You Kill Me, and Pain and Game.
- Has worked with fellow screenwriter Stephen McFeely on many Disney/Marvel and Non-Disney/Marvel films.
- Won a Primetime Emmy Award for Outstanding Writing for a Miniseries, Movie or a Dramatic Special
- Won two other awards and was nominated eight times