Construction contract management strategies are key in the achievement of a firms’ objectives. Construction projects are key in any economy due to their high contributions to the economy since they are key in facilitation of key activities. The study was on CMS and project performance of KENHA. The study objectives were to determine the extent of implementation of CMS in KENHA and to establish the effect of CMS on project performance in KENHA. The study adopted a descriptive statics. The study adopted use of strategic choice and agency theory. In the research methodology, the study adopted use descriptive statics. The target population consisted of 40 staff at KENHA. The study used primary data which was collected using questionnaires that were administered through drop and pick method. The supply chain managers, procurement managers or their equivalent were the respondents in KENHA. Data collected was analyzed by use of descriptive statistics and multiple regression analysis. Findings were displayed by use of tables for easy understanding. Data was analyzed using Statistical Package for Social Sciences (SPSS). The findings from the study revealed that CMS had been implemented in KENHA to a large extent. The study findings revealed positive and significant relationship between CMS and project performance. The research also concludes that 83% of project performance is affected by implementation of CMS at KENHA. The study recommends that future studies be carried out on CMS on other firms other than KENHA. In addition, we need to have a holistic view of other firms other than KENHA alone. The major limitation of the study was that it was solely based on KENHA.