The intent of this publication, Army Techniques Publication ATP 1-0.2 Theater-Level Human Resources Support January 2013, is to help guide Human Resources (HR) actions and enable decision making in conducting HR support at the operational level in a deployed theater of operation. ATP 1-0.2 provides a comprehensive view of HR doctrine at the operational level and focuses on the five key functions and tasks required in the execution and management of HR support. These functions and tasks include: - Casualty Operations. - Personnel Accountability (PA) Operations. - Postal Operations. - HR Planning and Operations. - HR Automation Support. ATP 1-0.2 discusses the roles, missions, and responsibilities of HR organizations and sustainment elements involved in theater-level HR operations. HR organizations include the Human Resources Sustainment Center (HRSC), Theater Gateway Personnel Accountability Team (TG PAT), Military Mail Terminal (MMT) Team, and HR companies and their subordinate platoons. Sustainment elements involved in HR operations include elements that enable HR organizations the ability to accomplish their mission. They include the Human Resources Operations Branch (HROB) located in the Expeditionary Sustainment Commands (ESCs) and sustainment brigades (SBs). Leaders, their staffs, and HR professionals at all levels must apply HR techniques using the military decisionmaking process (MDMP), risk management, troop leading procedures, and mission, enemy, terrain and weather, troops and support available, time available, and civil considerations (METT-TC). This publication also provides a doctrinal base for developing operational plans and associated standing operating procedures (SOPs). ATP 1-0.2 applies to all Active Army, the Army National guard (ARNG)/Army National Guard of the United States (ARNGUS), and the United States Army Reserve (USAR) unless otherwise stated. This doctrine applies across phases of unified land operations (offensive, defensive, stability, and defense support of civil authorities) and is applicable to all military operations, regardless of location. Army headquarters (HQs) serving as a Joint Force Land Component Command (JFLCC) or Joint Task Force (JTF) HQs should refer to Joint Publication (JP) 1-0, Personnel Support to Joint Operations and other JPs.