McWhirter has concentrated his practice in the area of civil litigation. Because of his undergraduate degree in industrial engineering he provides the firm skilled insight into a variety of cases ranging from construction defect matters, product liability and tractor trailer accidents.

Warren attended the University of Tennessee where he received a Bachelor of Science in Industrial Engineering in 1989. He later attended the Cecil C. Humphreys School of Law at the University of Memphis where he received his Juris Doctorate in 1991 and was thereafter licensed to practice law in Tennessee during 1992. He is admitted to practice in the U.S. District Court for the Western Section in Tennessee as well as the U.S. Court of Appeals for the Sixth Circuit in Cincinnati. From time to time, Warren also serves as a Special Judge in the General Sessions Court of Shelby County at Memphis. He is a Member of the Memphis Bar Association, the Tennessee Bar Association and the Defense Research Institute. 

Warren's areas of practice include insurance defense (personal and commercial lines), insurance coverage and bad faith matters, products liability, construction defect, medical malpractice, trucking and transportation defense, and general civil litigation.