Raymond A. Syms & Associates  
   Aeronautical consulting, research and litigation support services, for accidents, safety and regulatory issues. Based in New Jersey.
   http://www.syms.rotor.com/

Vertical Development  
   Helicopter aviation related expert witness services. Based in Wyoming.
   http://www.verticaldevelopment.com/

Transport Management Consultants, Ltd.  
   Expertise in the field of tachograph legislation and accident investigation, plus advice on legal problems relating to training and general haulage. London, England.
   http://www.tmc-ltd.com

RM Railroad Consulting Services, Inc.  
   Consultant services for railroads, railroad construction, and rail accident investigation.
   http://users.aol.com/rmonteferr/rmconsulting.htm

AirSafety Experts, Inc.  
   Offering aviation expertise and consulting for attorneys and insurance industry. Based in Colorado.
   http://www.airsafetyexperts.com/

Apollo Aviation Advisory, Ltd.  
   Experts for a full range of aviation subjects including licensing, operations and finance. Based in the United Kingdom.
   http://www.apollo-aviation.co.uk/

Charles L. Culver and Associates  
   Railroad operations consulting.
   http://www.culverassociates.com/