The purpose of the study is to analyse the relationship between an employee’s mindset behaviour and project performance. Quantitative method was used, and a census and convenience sampling techniques were adopted to distribute and collect data at a response rate of 74.60% from employees in the construction industry in the Kumasi Metropolis. Responses were assessed based on the significance level of the employee’s mindset behaviour on project performance using descriptive analysis, and the reliability of the scale was checked using Cronbach’s Alpha Coefficient. Six mindset elements, namely; employee commitment, employee involvement, job satisfaction, employee lateness, employee theft, and employee absenteeism were selected to ascertain their significance level on Project Performance. The study affirmed that the positive effect of employees’ job satisfaction, involvement and commitment to work leads to project performance. The study, therefore, contributed to knowledge by assessing the linkages between employees’ mindset and project performance, and also to the existing body of knowledge to aid and guide researchers in the adoption of appropriate theoretical framework in conducting research on the relationship between employee’s mindset behaviour and project performance. To recommend, further research should be done to develop a framework for managing the mindset behaviours of employees.