This manual, Joint Publication JP 4-10 Operational Contract Support March 2019, provides fundamental principles and guidance for planning, executing, and managing operational contract support in all phases of joint operations.This publication has been prepared under the direction of the Chairman of the Joint Chiefs of Staff (CJCS). It sets forth joint doctrine to govern the activities and performance of the Armed Forces of the United States in joint operations, and it provides considerations for military interaction with governmental and nongovernmental agencies, multinational forces, and other interorganizational partners. It provides military guidance for the exercise of authority by combatant commanders and other joint force commanders (JFCs), and prescribes joint doctrine for operations and training. It provides military guidance for use by the Armed Forces in preparing and executing their plans and orders. It is not the intent of this publication to restrict the authority of the JFC from organizing the force and executing the mission in a manner the JFC deems most appropriate to ensure unity of effort in the accomplishment of objectives.Joint Publication JP 4-10 Operational Contract Support March 2019: - Describes the principles of operational contract support.- Outlines proactive approaches for commanders and contracting officers to prevent fraud, waste, and abuse.- Describes the roles and responsibilities of the Department of Defense, the Joint Staff, and Military Departments, as well as joint and Service commanders and staffs, related to operational contract support.- Discusses the multidisciplinary team efforts essential to plan and integrate operational contract support in joint operations.- Provides examples of effective in-theater contracting organizational structures to maximize contracting support.- Presents the five steps and associated tasks of the contractor management process.