July, 1997 to Present: Associate Professor (tenured) in the Department of Civil Engineering at Kansas State University, Manhattan, Kansas.

August, 1993 to June, 1997: Assistant Professor (tenure-track) in the Department of Civil Engineering at Kansas State University, Manhattan, Kansas.

January, 1992 to July, 1993: Assistant Professor (tenure-track) in the Department of Civil, Mechanical and Environmental Engineering at the George Washington University, Washington, D.C.

September, 1990 to December, 1991: Visiting Assistant Professor in the Department of Civil, Mechanical and Environmental Engineering at the George Washington University.

May, 1987 to July, 1990: Graduate Research Assistant for the School of Civil Engineering and Environmental Science, University of Oklahoma, Norman, OK.

August, 1984 to May, 1987: Graduate Teaching Assistant for the School of Civil Engineering and Environmental Science, the University of Oklahoma, Norman, OK.

January, 1984 to May, 1984: Graduate Teaching Assistant in the Civil Engineering Department, Yarmouk University, Irbid, Jordan.

January, 1984 to May, 1984: Part-time lecturer at Grnatah Junior College, Irbid, Jordan.