Greg Gladden is a native Texan, reared in Fort Worth. He is a graduate of the University of Texas and Texas Southern University School of Law. He has handled cases in ten different states.

Greg Gladden has held positions including the Texas-Oklahoma Regional Vice Presidency of the National Lawyers' Guild (NLG) 1986-1996; the Chair of the Individual Rights and Responsibilities Section of the STATE BAR OF TEXAS 1992-1993; and the Board of Directors of the American Civil Liberties Union (ACLU) of Texas since 1992. He served as the President of the ACLU of Texas from 1998 until 2005.

Mr. Gladden has taught seminars sponsored by national, state, and local criminal law organizations, the National Lawyer's Guild and ACLU on subjects such as civil rights litigation, criminal defense, death penalty issues, and forfeitures.

Significant cases include:

• Roger Leroy "Animal" Degarmo, who in 1980, being represented by different attorneys, swore that he would kill the jurors and their families if they did not sentence him to death. They did. Seventy-two hours before the first execution date of March 1986, Mr. Gladden undertook the case. In August of 1992, after several execution dates, Degarmo was granted a new trial. In February of 1994 Mr. Gladden won a life sentence for Degarmo. Degarmo has been eligible for parole since 1999.
• United States v. Brissett was a case of first impression that expanded the definition of when a person is "legally" in the United States.
• Allen v. State limited the driver license "suspension" to the sixty or ninety days set out in the statute dealing with breath tests rather than the suspension being indefinite until DPS fees were paid.

Greg Gladden is the recipient of the American Jurisprudence Award for Constitutional Law and Evidence, as well as the Stonewall Lawyers Award.