The purpose of this article is to develop recommendations for the application of methods for assessing the managerial competencies of service personnel. The empirical basis of the study was made up of questionnaire surveys jointly developed with the organization’s management: a personnel assessment system (survey for managers), a personnel assessment system (survey for employees). The study was carried out on the basis of an organization engaged in the collection and purification of water for drinking and industrial needs. To comply with the principle of trade secrets, the work does not indicate the full name of the organization. When analyzing the results of the study, it was found that the personnel assessment system is more aimed at managers, employees are not aware of the assessment system; the assessment does not take into account the specifics of the organization and objectivity; Respondents are ready to introduce new methods and technologies in personnel assessment. All respondents who took part in the survey are satisfied with the current personnel assessment system in the organization. Based on the identified data, recommendations were developed for the use of personnel assessment methods. An important factor will be the involvement of employees in the evaluation process and taking into account their opinions can help increase confidence in the evaluation system and its results. When choosing evaluation methods, the views and preferences of employees should be taken into account to ensure their participation and active interaction with the process.