Erben is a founding partner of the law firm Erben & Yarbrough. He is now of counsel at the firm and is also an Adjunct Professor of Law at the University of Texas School of Law. He also has an extensive background in public service. He is a former Legislative Director to Governor Greg Abbott and the longtime General Counsel for Texans for Rick Perry. He has also served as Director of the state’s Office of State-Federal Relations, and in the U.S. Department of Housing and Urban Development. Erben received his undergraduate degree from Princeton University and his law degree from the University of Texas School of Law.