A practicing lawyer since 1992, specializing in civil, real estate, private international, family, and tort law. He began his career at the international law firm Fernando Scornik Gerstein, where he was Managing Partner from 1997. In 2005, he founded Casteleiro Abogados, focused on international clients, collaborating with national and international firms and participating in organizations such as IBA, PEOPIL-APIL, and IURISPAN. He speaks English (fluent) and German (conversational). He has attended conferences and courses in cities such as New York, London, and Paris. He has also held public office and chaired cultural associations in Gran Canaria, combining his legal work with a commitment to social and cultural life.