Master's work consists of 104 sheets, used 48 bibliographic sources. Relevance of the research topic. The peculiarity of the contractual work is that it is based on local regulatory acts, that is, such regulatory documents that are adopted directly by the enterprises themselves. Properly organized accounting is an important element of the system of measures to prevent breaches of obligations. It must ensure the creation of a documentary basis for analyzing the causes of non-fulfillment of contractual obligations, taking measures to prevent them and eliminating them, facilitate the correct consideration of claims and claims of counterparties, ensure the accuracy of data in the statistical reporting on the performance of contractual obligations. The goal is to develop measures to improve the management of post-warranty service of complex equipment. Objectives: to study the current state of after-sales service of complex equipment, to consider the legal support of after-sales service of complex equipment, to study the organization of the contract department at the enterprise, to consider the procurement process at the enterprise, to study the organization of contractual legal work at the enterprise, to develop recommendations for improving the management of post-warranty service. In conducting the study, general scientific research methods were used, in particular, comparison, historical, logical methods of analysis, comparative legal method.