Clinical health care documentation of all service members’ health care encounters is critically important for facilitating transitions of care and maintaining complete longitudinal health records. Austere environments create numerous logistical challenges for administering and documenting care in rapidly changing and, often, mobile environments. This presentation describes how the Joint Operational Medicine Information Systems (JOMIS) program under the Program Executive Office Defense Healthcare Management Systems improves health care for deployed service members through modernized documentation systems, ensuring longitudinal health records. In the past, medics and other care providers documented care from the point of injury through receipt of medical care mostly through verbal communication and templated paper documentation. JOMIS’ clinical application software solves several areas of need created by this, such as facilitating comprehensive data collection, streamlining communication throughout the echelons of care, integrating clinical decision support tools, and leveraging advanced technology. JOMIS improves service members’ health care and access to data by developing, deploying, maintaining, and modernizing operational medicine information technology solutions that support the full breadth of military operations.