Kenya Seed Company has adopted organizational practices in line with ISO 9000:2008. Te study analyzed the eﬀect of ISO 9000:2008 certification practices of leadership, continual process improvement, people involvement, customer focus and mutual beneficial supplier relationship on operational performance of Kenya Seed Company, Kenya. Te objective of the study was to determine the eﬀect of these practices on operational performance. Anchored on stakeholder’s management theory, the study used descriptive research design, stratified random sampling, a target population of 132 and a sample size of 99 respondents. Data were collected using a questionnaire whose validity and reliability were determined. It was analyzed using descriptive and inferential statistics and presented using frequency distribution tables. Te ISO 9000:2008
Practices had eﬀects to a great extent and contributed to 65.6% of the variation in operational performance. Te coefficients of y-intercept and these practices were significantly diﬀerent from 0 because their p values were less than 0.05. Te hypothesis “there is no significant relationship between ISO 9000:2008 certification practices and operational performance” was rejected. Te mutual beneficial supplier relationship showed a negative gradient. There is the need for the company to assess the company’s engagement with suppliers.