The results of this thesis show Joint Professional Military Education (JPME) has four primary impacts on the Unrestricted Line (URL) Naval officer career. First, JPME is an effective retention tool. Second, almost all URL officers completing WME do so between the 10 and 22 year points in their career. Third, a URL officer completing any form of JPME prior to the 0-5 promotion board does not have a significantly better chance of promoting to 0-5; whereas, a URL officer completing resident JPME prior to the 0-6 promotion board has a significantly better chance of promoting to 0-6- except in the case of nonresident WME, intermediate level Phase 1/11, and the equivalents (Federal Executive Fellowships or Foreign Service Colleges). For these three forms of JPME, the effect on promotion is insignificant at all levels. Fourth, unlike JPME, a URL officer completing any form of graduate education prior to the 0-5 promotion board has a significantly better chance of promoting to 0-5. In contrast, a URL officer completing graduate education after the 0-5 promotion board does not have a significantly better chance of promoting to 0-6.