The most important prerequisite for sustainable development of a territory is the building of a system of regional strategic management of the services sphere. The objective of the article is to develop an organizational mechanism for implementation of a region development strategy in the circumstances of servicization. The article presents characterization of the regional service economy and highlights its specific features. The authors have identified the problems and necessary adjustments of the system of regional management from the point of formation of the regional service economy. By comparing the existing methods of budgetary planning of the regional development, we have proven the high efficiency of the target-oriented technology; justified the necessity of making organizational changes in the administration of the executive power, including the transformation of rules and regulations for the formation and implementation of a development strategy in order to effectively manage the process of formation and development of the service economy. It has been proven that the presence of a dedicated structural unit in the system of executive bodies will allow to push the service sector of the economy of the "south" of the Tyumen region to the new level by improving the management of the processes of the regional economy conversion, and, as a result of the management, the efficiency of the executive bodies in achieving sustainability of the regional development.