1. Adjunct Professor, University of Maryland School of Medicine, Baltimore, MD
2. Reader in Bioactive Drug Chemistry, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, United Kingdom
3. Laboratory Director, Operations & Technology, Redwood Toxicology Laboratory, Santa Rosa, CA
4. Professor Dr., Institute of Forensic Medicine, University of Freiburg, Freiburg, Germany
5. Staff Scientist and Facility Head, Designer Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD