Assessment, as an integral part of the management process, it is the most effective system for the certification of the organization personnel. This procedure helps in determining the qualification and level of knowledge of employees, assess their abilities, moral and business skills. Each employee in the performance of his duties must use rational methods and modern technical means to ensure effective organization of production. The purpose of the article is substantiation of theoretical principles and development of practical recommendations for improving the procedure for assessing an agricultural organization personnel. The objectives of the research are: study of theoretical aspects and methodological tools, identification of the stages, and development of documentary support for the personnel assessment system. Such methods as the analysis of scientific and theoretical sources, the systematic approach, the method of comparative analysis, and generalization were used in the process of writing the article. The paper presents recommendations for the development of an effective certification system and its documentary support in agricultural organizations perfectly meeting the goals of the organization under study as well as its needs and the organizational culture developed in it.