Moises' career on Disney has included guest appearances on shows such as The Suite Life of Zack & Cody and a recurring appearance as Rico Suave on Hannah Montana, where he became a series regular in the show's second season as a shop owner on the beach. He made a cameo as Rico Suave again in Hannah Montana: The Movie. As a regular on the Disney Channel, Arias participated on the first and second Disney Channel Games on the red team. He also participated in the third Disney Channel games on the Yellow Team (Comets). He also appeared in 3 episodes of Wizards of Waverly Place as Max Russo's conscience. He was in the Disney Channel Original Movie Dadnapped.
He participated in the Guadalajara Film Festival during the presentation of the movie The Perfect Gametogether with Eva Longoria. He and his brother directed a series of YouTube films under the user name Moiswashere. They're currently working on a film called Motocross Madness. Arias appeared on the ESPN family of networks as a roving "sideline" reporter conducting interviews with fans and players at the 2009 Little League World Series.