Before joining the firm, Dennis clerked/interned for Justice James A. Baker of the Texas Supreme Court, Judge Paul Davis, 200th District Court Judge, Congressman Frank Lucas and even founded his own company, "Power Wash +." Since joining the firm, his practice has primarily focused on litigation, regulatory work for public utilities and Internet law. In this role, Dennis has successfully represented clients and litigated cases across Texas, as well as worked on billion dollar regulatory cases.

Dennis received his J.D. from the University of Texas School of Law and his Bachelors Degree from the University of Mary Hardin-Baylor (summa cum laude) with double majors in Political Science and History. Dennis completed both his undergraduate and law school education in just over five years.