| 2015 – Present | Professor, Zachry Department of Civil Engineering, Texas A&M University, College Station, Tx. |
| 2006 – 2015 | Associate Professor of Research, Zachry Department of Civil Engineering, Texas A&M University, College Station, Tx. |
| 2006 – present | Associate Professor of Research, Graduate School of Business and Public Policy, Naval Postgraduate School, Monterey, Ca. |
| 2000-2006 | Assistant Professor, Zachry Department of Civil Engineering, Texas A&M University, College Station, Tx |
| 1995-1999 | Associate Professor, Department of Information Science, University of Bergen, Norway |
| 1996-1998 | Adjunct Professor, School of Technology Management and Economics, Chalmers University of Technology, Göteborg, Sweden |
| 1996-1998 | Instructor, Mikkeli Polytechnic Institute of Technology, Mikkeli, Finland |
| 1993-1995 | Research Assistant, Sloan School of Management, Massachusetts Institute of Technology, Cambridge, Ma. |
| 1993 | Teaching Assistant, Department of Civil Engineering, Massachusetts Institute of Technology, Cambridge, Ma. |
| 1985-1986 | Instructor, Engineering Technology Division, Delgado College, New Orleans, La. |