About the author David V. MacCollum is a past president of the American Society of Safety Engineers and was a member of the first U.S. Secretary of Labor's Construction Safety Advisory Committee [1969-1972]. He has specialized in safety research and technical assistance on high-risk hazards to enterprise, insurance companies, universities, trade associations, attorneys, and government for over twenty years and was involved in the development of rollover protections and other safeguards and innovative construction methods and procedures. Mr. MacCollum holds a B.S. degree from Oregon State University and is a Registered Professional Engineer and Certified Safety Professional.