This research aims to measure the readiness of employees for the implementation of knowledge management in order to achieve the support and readiness stage of employees of PT. Mineral head office. This research is a descriptive study using quantitative data analysis. The authors distributed questionnaires to all employees at PT. Mineral's head office; 183 questionnaires were returned from the respondents for analysis. The analytical technique of the Structural Equation Model (SEM) is used to determine whether models and indicators are correct and to enable the measurement of the readiness of the employees. Confirmatory Factor Analysis (CFA) first order and second order were constructed using the statistical software, SPSS and AMOS. The variable of employee readiness comprised socialisation, externalisation, combination and internalisation (SECI process, in short).The result shows that PT. Mineral employees are highly ready to implement knowledge management. This means that employees of PT. Mineral are willing to encourage knowledge management activities. Based on the results of the study, to achieve the readiness stage, PT. Mineral should consider reviewing their programmes based on the SECI model.