Objective. In the development of the electronic industry, one of the strategic directions for the development of organizations is personnel training. The costs of training and the implementation of training courses in the context of the COVID-19 pandemic are significant. The purpose of this work is to increase the efficiency of engineers' activities in computer-aided modular design systems based on printed circuit boards (PCB) through the formation of the necessary competencies and recommendations for the designer.Method. The article provides an overview of methods and systems for the formation of CAD content in various industries. It is proposed to create a training system updated in real time, which will improve the skills of engineers and overcome gaps in production The structure of an automated learning system (AOS) is developed. What makes this structure different from others is an ontological model domain and an adaptive model. An adaptive method has been developed for constructing a CAD training course for enterprises in the instrument manufacturing industry, which is distinguished by the use of mechanisms for the interaction of learning models. The individual characteristics of the engineer being trained to form an adaptive learning scenario are taken into account in these learning models. This allows providing the optimal learning trajectory to the student with a reduction in learning time.Result. This research method is used to improve the skills of engineers in the course "Design of modules based on PP" at the X52 shipyard in Vietnam. As the results of the experiments, we can achieve a result that this effective method increases the level of engineering competence by 11.3% and decreases the total training time by 25.4 % compared to +the traditional method. Moreover, this method also reduces the cost of additional training for new engineers.Conclusion. The obtained results demonstrate the need to develop an adaptive training system. Thank to this method, the competency of the software-based modular design engineers will be developed. The adequacy of this method has been previously confirmed by the experimental data and the previous studies.