Warren is a graduate of Marshall University and of Regent University School of Law. She also attended Georgetown Law Center as a visiting student. While in law school, she clerked on the Senate Judiciary Committee. Warren served four years at the U.S. Department of Justice in Washington, D.C. After a few years in private practice as a civil defense litigator, Warren returned to public service and began her work in the Office of the West Virginia Attorney General where she primarily served as an appellate advocate for the State of West Virginia and as legislative counsel to the Attorney General.