What the Army calls organizational effectiveness (OE) other practitioners call organization development. The present study documented what OE interventions are employed in Army health care settings. Organizational effectiveness staff officers (OESOs) working in health care settings must keep in mind they are working in complex socio-technical systems. OESOs must work with the OE key managers and commanders to establish a systems approach toward attaining the goals of the organization. OESOs in health care settings are not significantly different from other OESOs in the percent of time spent in OE-related activities, in the number of OE operations accomplished, or the amount of time spent in evaluation and documentation. OE operations in health care settings must consider the mission requirements of the organization, the patient care requirements, management and health care provider needs, as well as the goals of the Army. There is a need for increased emphasis on evaluation and documentation of OE intervention effectiveness. (Author).