Dr. Miller holds a bachelor’s degree in Chemistry from Texas Tech University at Lubbock in 1971 and a degree in Medical Technology from Hendrick Medical Center in Abilene, Texas in 1972. He received a Ph.D. in Pharmacology from UT Southwestern Medical Center in Dallas, Texas in 1978. From 1978 until 1981, Dr. Miller served Post-Doctoral Fellowships at the University of Houston College of Pharmacy and the University of Colorado School of Medicine in Denver. He held a faculty appointment as Assistant Professor of Pharmacology at the University of Houston College of Pharmacy from 1981 until 1984, and was employed as a Research Toxicologist for Shell Oil Company in Houston from 1984 to 1987. Dr. Miller subsequently was employed by Quest Diagnostics Incorporated in Irving, Texas from 1987 until 2007 as the Laboratory Director of Clinical and Forensic Toxicology. In that capacity, he supervised approximately 40 staff and was responsible for the technical and administrative operations of a federally certified reference laboratory engaged in the conduct of clinical and forensic drug testing. He has authored a number of scientific publications. Dr. Miller has served as an advisor to numerous employers and agency personnel on the subject of workplace drug testing, and has acted as a technical consultant and expert witness for attorneys in litigation. He has provided sworn expert testimony in hundreds of court cases, depositions and administrative hearings involving the topics of drug and alcohol testing, pharmacology and forensic toxicology.