The purpose of the descriptive case study with a multiple case framework was to (a) describe the organizational cultures of education programs and leaders in the United States (U.S.) Department of Defense (DoD) voluntary education system on Oahu, Hawaii; (b) determine if an overlapping common organizational culture exists; and (c) assess the cultural feasibility of increased joint-service integration. Semi-structured interviews were conducted with 21 education system leaders, including education service officers (ESOs); unit level education officers (EOs); and college directors from U.S. Air Force, U.S. Army, U.S. Marine Corps, and U.S. Navy education centers. The data analyzed from each education program across the four services revealed nine organizational culture commonalities and four joint-service organizational culture attributes within the nine culture commonalities. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]