Oscar Villarreal-Young Executive Oscar Villarreal was a very young success and a very young executive. While he was working on his undergraduate degree, Oscar Villarreal worked for a tech startup called Tech-Start LLC. Incredibly enough, Oscar Villarreal started his internship and quickly assumed more duties within the company. Within three years, Oscar Villarreal was the director of international business for Tech-Start LLC. In 2009, Oscar Villarreal began working on his Masters of Business at Harvard University. He completed the concentrated program that had a focus on Energy Development and Geopolitical Studies.