The main objective of this thesis is to develop a model for selecting the appropriate contractor for the project being implemented by taking advantage of the analytical hierarchy process as a methodological basis for the selection process. This model will be tested by applying it to a realistic scenario, where the contractors participating in the tender are subject to the evaluation process for the selection of the best contractor for the proposed project. In order to achieve the objectives of this study, the main criteria and sub-criteria used in this study were determined through constructive interviews and distribution of questionnaires designed to determine the main criteria and sub-criteria and their quantitative weights. In the first phase respondents were asked to evaluate the importance of the main criteria and sub-criteria mentioned in the first questionnaire. The same respondents were then asked to make reciprocal pair-wise comparisons through the second questionnaire which was based on the methodology of the analytical hierarchy process distributed in the second phase in order to determine the weights of the main criteria and sub-criteria. Then, a contractor selection model was developed. The main criteria and sub-criteria were organized using the geometric mean and Satty's linear scale. The open decision maker (ODM) software was then used to determine the weights of the selected criterions in the first phase and determine the winning contractor. As a result of the study conducted, The main criterion which had the highest relative importance was Technical Capability in comparison with the local determined factor used for selection which was Bid Price.