DALLAS--(BUSINESS WIRE)--Roy’s Restaurant, an internationally-acclaimed restaurant founded by Roy Yamaguchi and known for its fresh seafood, innovative chef creations and Pacific Rim cuisine, announced today the addition of Mario Cernadas as chief operating officer. With extensive experience in the restaurant industry, Cernadas will oversee daily operations of Roy’s Restaurant. “As we accelerate and prepare Roy’s for the future, we are honored to have Mario join the Roy’s Ohana, leading day-to-