1. Postdoctoral Research Associate, Lecturer, Dept. of Civil Engineering, Catholic Univ. of America, Washington, DC 20064.
2. Associate Professor, Director of Construction Engineering and Management Program, Dept. of Civil Engineering, Catholic Univ. of America, Washington, DC 20064.
3. Graduate Research Assistant, Doctoral Student, Dept. of Civil Engineering, Catholic Univ. of America, Washington, DC 20064.