His expertise also extends to multiple cruise ship casino operations, where he served as the Director of International Gaming for MGM. In addition to his work with MGM, Duke has worked at renowned establishments such as Caesars Palace in Las Vegas, as well as in New Mexico, Oklahoma, and California. His international experience includes working in South Africa, on cruise ships, and in the Philippines.

Duke has held hands-on roles throughout his career, including Assistant Shift Manager, Shift Manager, Cage Supervisor, Credit Manager, Director of Table Games, Executive Director of Gaming Operations, and General Manager. His diverse experience and comprehensive knowledge of the gaming industry have contributed to his success and established him as a respected figure in the field.