Assistant Professor,(October 1987-Present), Department of Civil Engineering, Birzeit University, Birzeit. Chairman of the Department of Civil Engineering since September 1995. Taught the following civil engineering courses: introduction to transportation, highway engineering, traffic engineering, engineering statistics, surveying, and statics. Supervised several senior graduation projects among them :

(1) Planning and preliminary design for the sea port of Gaza

(2) Planning and design of Gaza airport

(3) Transportation system management project for the city of Ramallah, West Bank.

Membership of the University's academic council.

President of the union of faculty and employees for two successive terms.(1991-1994)

Chairman of the organizing committee for the Palestinian Academic Conference, October 1992.

Consultant on several transportation studies and projects among them:

- The Institutional Building of the Palestinian Physical Planning Capacity/ Transportation Sector Project for the Palestinian Ministry of Planning in coordination with Aspan Viak/ Norway.

- Action Item Plan for Inter-Urban Public Transport Services In West Bank and Gaza Project for Daimler-Benz Aerospace/Germany.

Research fellow (1986-1987), Office of Safety and Traffic Operations, Research and Development, Federal Highway Administration, McClean, Virginia, USA.

Teaching Assistant (1985-1986), Department of Civil Engineering, University of Maryland, College Park, Maryland, USA. Participated in several on-going projects, including origin-destination surveys, spot speed studies, and intersection turning movement counts supervision, data analysis, and intersection redesign.

Instructor,(October 1982 - July 1985), Department of Civil Engineering, Birzeit University,Birzeit, The West Bank. Taught several civil engineering courses. Worked with the University Engineering Consulting Office on two major projects:

- The geometric design of a five kilometer, four lane circumference road around the University.

-Town planning for the cities of Jericho and Quabatia in the West Bank, including design of streets and intersections.

Transportation Engineer (1980-1982), Counsel-Trans, Inc. Rockville, Maryland, USA. Worked on the following projects:

- The passenger car equivalent study: analysis of the construction, maintenance, and operation cost of highways, and the estimation of the trucks share of the cost based on their use and requirements.

- Traffic impact analysis for several proposed developments, the analysis included trip generation, distribution, modal split, and assignment predictions of traffic, and the impact of the traffic associated with the development on the existing transportation facilities.

- The transportation needs of woman study, which included the review of transit systems in Washington, D.C., Atlanta, and Chicago.

- Evaluation of flexible and rigid highway pavements via photo-logging techniques.

Civil Engineer (1979-1980) Morrison-knudsen Saudi Arabia Consortium, Boise Idaho, USA worked on the construction of King Khalid Military City in Saudi Arabia. Worked in two departments:

- Cost Engineering Department (March 1980 - August 1980), Worked on the cost coding of engineering materials, auditing of cost accounts and analysis of cost and schedule variances.

- Quality Control Department (January 1979 - February 1980), Worked on laboratory and field testing of soil, concrete, and asphalt. Supervised concrete and asphalt mix designs.

Inspector (June 1978-October 1978),Rummel, Klepper, and Kahl, Baltimore, Maryland. Inspection of the construction of a sewer line in Baltimore county, Maryland.