Rosario is a voice talent and German-Italian actor. He completed his acting training at the Music & Theater College in Zürich (now ZHdK) and also worked as a broadcaster for Swiss Radio SF DRS. In addition to theater engagements, such as at the Zimmertheater Tübingen and the Young Playhouse Zürich, he appeared in several film productions of the Film University Baden-Württemberg. In 2006, he was awarded the Promotion Prize of the Armin Ziegler Foundation for his artistic achievements. Since 2005, he has also worked as a voice actor in dubbing, off-/advertising, voice-over, image films, radio features, and audiobooks, including for Deutschlandradio. Nevertheless, he remains committed to acting.