United States Army (1971-2001)
- All Ranks from Second Lieutenant to Colonel, Medical Service Corps (Lieutenant) and Medical Corps (Captain to Colonel)
- Expertise developed in Healthcare administration, Chemical and Biological protection, Health Standards, Operational Medicine, Aviation Medicine, Aeromedical Evacuation, Medical Policy and Doctrine Development, and NATO operations
University of Maryland School of Medicine (2001-2012)
- Adjunct Associate Professor, National Study Center for Trauma and Emergency Medical Services
- Seconded to U.S. Army Telemedicine and Advanced Technology Research Center to run their European Office, and to support US military coordination with NATO and the European Commission in the topical areas of medical research, telemedicine development and fielding, Medical Communications and Information Systems, and medical standardization
Shaman Medical Consulting (2012-present)
- Private Medical Consulting Practice