Cox received a Bachelor of Arts in government from the University of Texas at Austin in 2007 and a Juris Doctorate from the St. Mary’s University School of Law in 2010. During law school, Cox worked with the prosecutor’s office in his hometown of Corpus Christi, interned with the Supreme Court of Texas, served as an editor for the St. Mary’s Law Journal, and extensively studied international and comparative criminal procedure. Prior to joining his current firm in the fall of 2013, he served as a law clerk to United States District Judge Orlando Garcia in San Antonio, and as a briefing attorney for Justice Gina Benavides at the Texas Thirteenth Court of Appeals in Edinburg, Texas. In these roles, he regularly assisted the courts with sentencing issues, appeals, criminal trials, and prisoner civil rights cases.