The following is a representative list of organizations to whom Dr. Lewis has provided training and/or consultation:
- The Federal Aviation Administration
- The U.S. Postal Service
- The Department of Energy
- The Office of Personnel Management
- The U.S. Army
- The U.S. National Guard
- Panama Canal Commission
- The Government of Barbados
- Johns Hopkins University and the Johns Hopkins Medical Center
- Harvard University
- The City of Phoenix, Arizona
- Cambridge Police Department
- Roger Williams University, School of Justice Studies
- Merrill Lynch
- Hartford Hospital
- Yale New Haven Hospital
- INOVA Healthcare Systems
- Staten Island University Hospital
- World Conference on Disaster Management
- Public Service of New Hampshire
- Johnson & Johnson Orthopedic
- General Motors/IUE
- Northeast Law Enforcement Officers Association
- The Boston Globe
- Massachusetts Department of Elder Affairs
- Bank of Montreal
- Massachusetts Fire Fighters Academy