1. Assistant Professor, School of Design and Construction, Washington State Univ., Pullman, WA.
2. Professor, Dept. of Engineering Technologies, Safety, and Construction, Central Washington Univ., Ellensburg, WA.
3. Professor, School of Civil and Construction Engineering, Oregon State Univ., Corvallis, OR.
4. Director of Safety, Associated General Contractors of Washington, Seattle, WA.