Lian Orraca Rosario is a young Puerto Rican entrepreneur, born and raised on the island. He graduated at the top of his class in engineering from the University of Puerto Rico at Mayagüez and spent five years as an engineer at the Applied Physics Laboratory while earning his master’s degree in engineering at Johns Hopkins University. Lian returned to Puerto Rico, driven by his passion for construction, to found Onsite, a leading subcontractor focused on delivering high-quality, specialized services that contribute to the island’s growth and infrastructure development.