Abstract: The subject of this research is the professional reliability of operators of the air traffic control as the level of flawlessness, accurateness, and promptness of their work with regards to interaction with the technical systems or other specialists involved in the process of air traffic control. To benefit the increase of the professional reliability of operators of air traffic control, the authors conduct a research on the connection between the level of their professionally important qualities and the work experience, as well as analyze the possibility of the target training of these qualities, aimed at their development during the period of the scheduled advanced training. The professiographic analysis alongside the methods of engineering psychology, psychophysiology, mathematical psychology, and ergonomics are applied in this work. In the conclusion, the authors determine the professionally important qualities of the operators of air traffic control, the level of which has significantly increased as a result of special training. The article demonstrates the possibility of their improvement and development by means of the cycle of trainings, using the staff automated work place of the specialist of professional selection.