1. Graduate Research Assistant, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas at Austin, Austin, TX.
2. Postdoctoral Fellow, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas at Austin, Austin, TX.
3. Associate Professor, Dept. of Civil Engineering, Federal Univ. of Sao Carlos, Sao Carlos, Sao Paulo, Brazil.
4. Professor, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas at Austin, Austin, TX.