Vredenburgh & Zackowitz, Inc.

Human Factors, Ergonomics, Safety,
Engineering & Organizational Consulting


Our professionals serve as human factors and engineering consultants for businesses and as expert witnesses in cases concerning human factors, engineering, ergonomics and safety. Vredenburgh & Zackowitz, Inc. has delivered innovative solutions in a cost-effective manner since 1998. We realize this mission by setting the highest standards in service, reliability and expertise in our industry. We are committed to maintaining excellence, respect, and integrity in all aspects of our operations. We strive to reflect the highest ethical professional standards in our relationships with clients.

Industrial-Organizational Consulting

We consult with organizations to help develop their ergonomics and safety programs. We have the expertise to assist companies in their hazard management and communication including the assessment of equipment design, machine guarding and safety devices, and the development of warning labels, instructions, signs, and manuals. Our industrial ergonomics consultants perform job hazard analyses and help organizations respond to OSHA citations. Our consultants also have the certifications and experience to develop and administer your Americans with Disabilities Act (ADA) plan.

Human Factors Expert Witnesses
Heavy Equipment Ergonomics

Human Factors and Safety Expert Witnesses

Vredenburgh & Zackowitz, Inc. consultants are often requested to serve as forensic human factors expert witnesses. Our human factors and engineering experts have consulted on hundreds of cases concerning human factors and safety issues including product design and warnings, personal injury, transportation safety, children and schools, Americans with Disabilities Act (ADA), premises liability and employment issues.

Forensic Research
Employee Training

Organizational, Industrial and Product Safety & Injury Prevention Consulting

The fields of human factors and engineering are multi-disciplinary sciences that can be described as the interaction between psychology and engineering, and their relationship to design. We evaluate the user interface between people, products, and the environment. Human factors and engineering take into account the capabilities and limitations of people in the design of products, user environments and the workplace. Our consultants take an integrated approach to support your organization’s employee education and training, product design evaluation, warnings development and testing, product user experience, job task analysis, diversity and discrimination, accessibility, disability accommodations, and risk management/safety programs.

Coefficient of Friction Testing


Our consultants conduct research and publish peer-reviewed articles relevant to human factors, safety and employment. We have authored book chapters and served as peer-reviewers and on editorial boards. Our consultants are often asked to speak regarding these issues.


The consultants of Vredenburgh & Zackowitz, Inc. can perform a variety of testing in the course of their work. Such testing includes: coefficient of friction testing, sharpness testing, slope measurements, force measurements and illumination testing.