Glenn Murdock was born in Enterprise, Alabama, on June 25, 1956. After graduating from Enterprise High School in 1974, Justice Murdock attended The University of Alabama, where he served as Student Government Vice President. He graduated Phi Beta Kappa and summa cum laude in 1978, with a Bachelor of Arts degree in Political Science and Economics. He received his Juris Doctorate degree in 1981 from the University of Virginia Law School.
Upon returning to Alabama, Justice Murdock served for a year as a law clerk to the late Clarence W. Allgood, United States District Judge for the Northern District of Alabama. Thereafter, he engaged in private practice, emphasizing commercial, constitutional, and election law. He also served as in-house counsel to a national corporation and as a State Administrative Law Judge. His practice included cases before the state and federal courts of Alabama, as well as the Eleventh Circuit Court of Appeals. In 1994 and 1995, he served as an attorney to The Honorable Perry O. Hooper, Sr., in the successful year-long federal court litigation to establish the lawful winner of the 1994 Alabama Chief Justice election.
In 2000, Justice Murdock was elected to the Alabama Court of Civil Appeals, where he served from January 2001 to January 2007. He was elected to the Alabama Supreme Court in 2006 and began serving on that Court in January 2007. Justice Murdock was reelected to the Supreme Court without opposition in 2012.
Justice Murdock has been married for 37 years to the former Margaret Gilchrist of Hartselle, Alabama. They have three children and three grandchildren. Justice Murdock is a member of the Rotary Club of Birmingham.