Harold has a degree in Advertising and Public Relations from the University of Valladolid, where he was part of the team that represented the faculty at the 2025 Effectiveness Awards with a project for Repsol.

During his training years, he worked as a Social Media Specialist at the David agency and was nominated in different categories of the University Festival of Publicatessen: Imitation Trophy (XVII edition, 2025), International Mobility, and Segovia Council (XVI edition, 2024).

He joined the Ernest team in June 2025 as an Account Executive.