Who are the unofficial Walt Disney Theme Park Ambassadors? Custodial Cast Members are the unofficial Park Ambassadors. Who are the unofficial Walt Disney Theme Park Ambassadors? Guess. Hint, it’s the group of Disney Cast Members that get more questions asked of them than any other group of Cast. Next Blog By jeff noel Retired Disney Institute Keynote Speaker and Prolific Blogger. Five daily, differently-themed personal blogs (about life's 5 big choices) on five interconnected sites. View all of jeff noel's posts.