1. Director of Engineering, Watershed Geosynthetics, Alpharetta, GA.
2. Professor, Dept. of Aerospace Engineering, Iowa State Univ., Ames, IA.
3. Formerly, Graduate Student, Dept. of Aerospace Engineering, Iowa State Univ., Ames, IA
4. Formerly, Assistant Professor, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., Ames, IA