1. Postdoctoral Scholar, Center for Bio-mediated and Bio-inspired Geotechnics, Arizona State Univ., Tempe, AZ 85287-3005; Assistant Professor, College of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia.
2. Postdoctoral Research Associate, Center for Bio-mediated and Bio-inspired Geotechnics, Arizona State Univ., Tempe, AZ 85287-3005.
3. Regents’ Professor, Center for Bio-mediated and Bio-inspired Geotechnics, Arizona State Univ., Tempe, AZ 85287-3005.