Development and implementation of the transformability principle have been preceded by insufficient satisfaction of trainees, federal and municipal officers in particular, with the quality of conventional supplemental professional programs of further training, as well as their low motivation to learning and improvement of professional competences. This article is aimed at analysis of efficiency of implementation of transformability principle into supplemental professional programs of further training. Focused interview and focus groups method by R. Merton were the main research method. This procedure was applied during training of two focus groups according to transformable supplemental professional program titled Manage by word, aimed at development of communication competences of government representatives (309 civil officers of Tambov oblast) and officers and heads of multifunctional centers of state and municipal services (58 persons). The term “transformability” implies structuring of education route by trainees themselves as well as existence of mandatory and variable elements allowing to adapt the program content to various targeted audiences. The main results of the work have been confirmation of satisfaction of trainees with the quality of transformable supplemental professional program and improved motivation to learning.