Casey O'Neill was a utility stunts performer in Iron Man 2, a stunt performer in The Avengers and Guardians of the Galaxy, a co-stunt coordinator in Captain America: The Winter Soldier and a stunt coordinator in Guardians of the Galaxy Vol. 2, Agent Carter and Marvel One-Shot: Agent Carter.
- Casey O'Neill was a stunt performer in the Sony Pictures Studios production Spider-Man 2.
- Casey O'Neill was a stunt performer in the Universal Pictures production Hulk.
- Casey O'Neill was a stunt double for Shia LaBeouf in the DC Entertainment production Constantine.
- Casey O'Neill was a stunt performer in the comic book adaptation Cowboys & Aliens, in which he once again worked with Jon Favreau.