Effective performance of any organization deeply depends on the performance of its employees; therefore employee training is something unavoidable in the organization and should not be overlooked or undermined. Drilling companies need well trained, competent and experienced employees to meet their goals and objectives. The purpose of the study was to analyse the impact of employee training on the performance of drilling companies in Geita, Shinyanga and Mara Regions in Tanzania and to provide concrete evidence on the contribution of employee training on performance of drilling companies. The study comprised a sample size of 219 respondents selected using purposive and simple random sampling techniques. Data collection was done through the questionnaire administered to the respondents. Data was analysed using descriptive statistics and results presented using tables. The study results found that employee training has a significant effect on the performance of drilling companies. However, the study results found lack effective training and development policies in drilling companies. The study recommended that there is a need for drilling companies to develop proper and effective training and development policies which will guide their training procedures also help in the implementation of training strategies.