1. Assistant Professor, Dept. of Industrial Technology, Univ. of Nebraska Kearney, NE.
2. Ph.D. Candidate, Dept. of Civil, Construction, and Environmental Engineering, Univ. of Alabama, Tuscaloosa, AL.
3. Lecturer, Dept. of Building, Covenant Univ., Ota, Nigeria.
4. Lecturer, Dept. of Quantity Surveying, Bells Univ. of Technology, Ota, Nigeria.
5. Assistant Professor, Dept. of Civil Engineering, Univ. of Jordan, Amman, Jordan.