Writer (2 episodes)

Story (1 episode)

Writer (4 episodes)

Writer (1 episode)

Writer (1 episode)

Janitor Poopatine (voice) (3 episodes)

Writer (37 episodes)

Executive Producer (100 episodes)

Writer (1 episode)

Producer (13 episodes)

Producer (80 episodes)

Writer (12 episodes)

Producer (104 episodes)

Writer (3 episodes)

Executive Producer (43 episodes)

Creator

Writer (4 episodes)

Writer (4 episodes)

Producer (552 episodes)

Supervising Producer (3 episodes)

Co-Executive Producer (1 episode)