aim of the study was to examine the employee participation in decision making and its impact on the organizational performance of SCIK. Informative, consultative, administrative, associative, and decisive participation levels; and formal and informal participation of employees in decision making, participative decision making, and representative participation of employees in decision making were identified as an independent variable in this study. The research has followed quantitative research approach, survey as a strategy, and structured questionnaire adopted from previous related works as data collection instrument. The research used descriptive and explanatory research design. The data was collected from the employees of SCIK across the existing occupational levels working at the head office, Nairobi, Kenya . Proportionate stratified sampling method along with random sampling techniques was applied to identify respondents proportionately across the occupational levels. Both primary and secondary data sources were used to gather data. The study has utilized a statistical tool called SPSS V.25 for doing the analysis. Descriptive statistics were used for summarizing and presenting the data. In addition to this, inferential statistical tools such as correlation, and regression analysis were utilized for examining the relationship between dependent and independent variables. The study revealed that associative and informative participations; and representative participation are the most practiced levels and types of employee participation in SCIK. The study found that there is a positive and statistically significant relationship between all independent variables and dependent variable; and all independent variables have a significant impact on the organizational performance of SCIK. The study concludes that, among the identified independent variables, there is strongest relationship between informative participation level and organizational performance of SCIK followed by participative decision making and formal and informal participation of employees in decision making respectively. In contrary, consultative, and associative participation levels have the least impact on the organizational performance of SCIK. The study recommends that SCIK should focus on implementing all dimensions of types of employee participation in decision making to enhance the performance of the organization.