1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, South Dakota State Univ., Brookings, SD.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, South Dakota State Univ., Brookings, SD.
3. Assistant Professor, Dept. of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India.
4. Associate Professor, Dept. of Civil Engineering, Univ. of the District of Columbia, Washington, DC.