David Wallis is the Director of the Office of Engineering Safety and directs the development of electrical and mechanical standards for OSHA. Mr. Wallis has been writing electrical standards for over 30 years. He holds a B.E. in Electrical Engineering from Stevens Institute of Technology and has taken graduate level courses in electrical power engineering at the University of Southern California. He is currently a member of American Society of Testing and Materials Committee F18 on Electrical Standards for Workers and a member of the Work Rules Subcommittee of the National Electrical Safety Code. He is past Chairman of ASTM Subcommittee F18.60 on Terminology and F18.93 on National/International Standards. He is the primary author of ‘1910.137, Electrical Protective Equipment, and ‘1910.269, Electric Power Generation, Transmission, and Distribution.