He is a managing partner at Mejias, Milgrim & Alvarado, where he has practiced law for 18 years. He currently serves as the chairman of the Long Island Hispanic Bar Foundation, the charitable branch of the Long Island Hispanic Bar Association for which he has previously served as president. In 2003, Mejias became the first Latino elected to the Nassau County Legislature, where he served from 2004 to 2010. He contributed this article to Live Science’s Expert Voices: Op-Ed & Insights.