The Egyptian market often suffers from delayed or unappropriated quality delivered projects and this is due to many economic, political, and climatic reasons of each country, but what concerns us in this research is the role of the project implementation responsible contractor. Therefore, the contractor selection is an essential step as well as project design and feasibility study and this is what was studied in this paper that interested in determining the most effective factors to the Egyptian market for either prequalification or bid evaluation stage in contractor selection process. A survey was carried out through literature reviews of international journal published research to get the most common important factors from different countries worldwide. Therefore, using them to conduct a questionnaire distributed to a sample of specialists in different fields of Egyptian construction industry. To quantify respondents' opinions and to deal with human linguistic and vague descriptions, triangular fuzzy sets have been used to represent each specialist perception. So, forty-eight factors have been aggregated in a questionnaire to be evaluated by decision makers that express their rating of contractors' performance in linguistic terms has been converted by using Fuzzy Delphi Technique Model into numerical values used as equation inputs resulting in accurate preferably main seven factors which makes the selection process more consistent and realistic. Those factors are recommended to be taken in consideration and evaluated for each candidate contractor