Human Engineering Limited  
   Specialists in ergonomics and human factors solutions including design, evaluation, analysis and research.(UK and Scotland)
   http://www.humaneng.co.uk/

Thompson, David A. PhD  
   Human factors consultant with expertise in vehicle operation, machine guarding, biomechanics, warnings and instructions and falling objects injuries.(US)
   http://www.human-factors.org/

Purswell & Purswell, Engineering & Ergonomics, Inc.  
   Consultant providing ergonomics and safety consulting services to manufacturers, government agencies, and attorneys in the following areas: Traffic Safety, Occupational Safety, Product Safety, Biomechanics, Work Physiology, Ergonomics/Human Factors, Warni
   http://www.purswell.com/

IDEO  
   Specialists in human factors, psychology, business, design, engineering and manufacturing provide full service consulting for product innovation and design. Site describes services, methods and provides client list and project profiles. (US, UK, Germany,
   http://www.ideo.com/

Carlow International Incorporated  
   Description of human factors engineering and ergonomics services. Areas of expertise include: ships and maritime, care for the elderly, ergonomics and usability testing. (US and Ireland)
   http://carlow.com/

UserWorks, Inc.  
   Usability services, in-house portable usability labs, HCI (human computer interaction), human factors engineering, ergonomics, focus groups & user interface design. (US- Maryland)
   http://www.userworks.com/

Consultants Directory: Human Factors and Ergonomics Society  
   Searchable directory of human factors and ergonomics consultants. Provides contact information for HFES members by area of specialty, last name, business name, location and expertise.
   http://www.hfes2.org/search/

Applied Safety and Ergonomics, Inc.  
   Human factors, ergonomics, and safety engineering consultants with expertise in warnings, product safety, occupational safety, transportation safety, occupant protection, human error, human movement, climbing and stability, human performance and risk per
   http://www.appliedsafety.com/

Ixian Technologies  
   A full-service market research and usability consulting firm. Specialties include: usability and HF Analysis, usability testing/analysis, voice technology interface design, design for accessibility/ADA, call center design.
   http://www.ixiantechnologies.com/

Roebuck Research and Consulting  
   Expert assistance with questions of human body dimensions(anthropometry) and their applications to ergonomic designs. John Roebuck can help you write proposals, plan surveys, analyze data, prepare reports and apply data in innovative ways.
   http://home.earthlink.net/~johnroebuck/

Beta Research, Inc.  
   Consulting and research in usability and safety in product and system design. Includes company details and links to standards and references on technical reports.
   http://www.beta-research.com/services.html

Anacapa Sciences, Inc.  
   Research on human behavior and performance in systems and organizations, development of training in real and virtual environments, human-centered design and testing of systems, equipment, and procedures, analytical techniques for the investigation of comp
   http://www.anacapasciences.com/

Ergonomic Systems Design, Inc.  
   Consultant in the application of human factors engineering methods, and ergonomic data to facilities, vehicles, equipment, devices, and jobs. Site includes information on human factors engineering services, user interface, user and market research, test a
   http://www.ergonomicsystemsdesign.com/

Convergent Design Inc  
   Description of consulting services focused on the design of "products that understand people".
   http://www.convergentdesign.com/

Human Factors, M.D.  
   Usability engineering firm focused exclusively on the medical device industry. Services include: User Research, Product Assessments, Software User Interface Design and Human Factors Program Development.
   http://www.humanfactorsmd.com/

Human Factors Consultants  
   Consultation and legal expertise in human factors issues of safety, warnings, human error, accident evaluation, equipment design, and training adequacy. Site includes services, biographical information of principles, research, presentations, case citatio
   http://www.humanfactorsconsultants.com/

Human Factors Engineering Solutions  
   HFE Solutions conducts research and management of human factors and is a registered ergonomics consultancy specializing in user interface and design.
   http://www.hfesolutions.co.uk

Aimee Bell - Design Research  
   Human factors/user interface consultant specializing in consumer products, web, E-Commerce, children's products and technologies, medical devices, environments and furniture.
   http://www.aimeebell.com/

Samaras & Associates, Inc.  
   Human factors consultant specializing in medical device and pharmaceutical manufacturing equipment ergonomics, especially where automation is a critical component. (US)
   http://www.samaras-assoc.com/ergonomics.htm

Error Analysis, Inc.  
   Human factors, safety and accident reconstruction consultants. Corporate info, clients, and publications.
   http://www.erroranalysis.com/

humfax  
   Applying fundamental psychological principles to the design of industrial products.
   http://www.humfax.com