The article discusses the system of training and development of personnel of the largest oil and gas company - “Karachaganak Petroleum Operating B.V.” (KPO B.V.), which ensures that the qualifications of employees meet production requirements. The approaches used for training and retraining personnel in terms of mastering new equipment and technologies, targeted training of the national personnel reserve and young specialists allow us to form a modern personnel potential. The training of their own employees, the attraction and retention of qualified and competent personnel, and the improvement of the professional level of employees are carried out on the basis of long-term programs by the specialized personnel training and development sector “Karachaganak Petroleum Operating B.V.”. The modern methods of training and development of company personnel, their professional training in the field of industrial and technical competence, participation in international certified programs, as well as in internship programs are considered. The system of dual education on the basis of the KPO B.V. training center, the student and youth internship program is considered. Statistical data are presented that characterize the dynamics of the number of trained employees in certain categories, the expenditure of training time per employee. The experience of KPO B.V. in the field of training and development, and personnel can serve as an example to other enterprises of the oil and gas industry of Kazakhstan.