Understanding the dynamism of organizational culture and its effect on employee performance is very crucial to organizational strategic objective. This study aims to examine the effect of organizational culture on employee performance. The researcher used descriptive and explanatory research design with quantitative approach in order to meet the objective of the study. The target population for this study was 1385 permanent employees of Bahir Dar Textile Share Company, Located in Bahir Dar. Out of 1385 permanent employees, 308 respondents were selected using stratified random sampling technique. The four component of the organizational culture Involvement, Adaptability, Mission and Consistency were visualized based on Denison Model. Structured questionnaire with five point Likert scale were used to collect the data. A total of 272 questionnaires were used for this study and the data were analysed using descriptive and inferential statistics. The data collected were summarized, classified and tabulated and analysed using SPSS version 26. The result of Spearman correlation test shows that there exists a positive relationship between the four organizational dimension variables (i.e. mission, adaptability, involvement and consistency) and employee performance. But the magnitude of the relationship varies from one organizational culture dimensions to the other where, mission has a strong correlation with employee performance, involvement and consistency have moderate correlation with employee performance and finally adaptability has a weak correlation with employee performance. The result of ordinal logistic regression shows that 81.6% of the variance of employee performance can be predicted by the independent variable (i.e. mission, adaptability, involvement and consistency). In addition, the result of ordinal logistic regression shows that mission and involvement have a positive significant effect on employee performance while adaptability and consistency have insignificant effect on employee performance. Organizations should give a strong concern for the practice of organizational culture especially for involvement and mission dimensions of organizational culture.