The life and career of a U.S. warfighter comprises an extensive list of complex emotion-evoking experiences. It is not uncommon for military personnel, within all branches and occupational specialties, to regularly experience a broad range of fluctuating emotions including boredom, pride, frustration, excitement, happiness, and fear. Further, these emotions can often enhance or detract from unit performance during missions, training events, and also while at home station. Historically there has been a great deal of attention paid to ensuring military personnel are tactically prepared. However, there has been less emphasis on the affective or motivational side for ensuring mission success. As one Army Solider said during data collections for this effort, "the [military] does not like to talk about emotions but we [leaders] deal with them every day." Ultimately leaders are responsible for assuring the performance of their unit by monitoring and managing the everyday emotions of their unit members. Such behaviors are referred to as Leader Emotion Management (LEM) (Kaplan, Cortina, Ruark, Orvis, Engel, & Langkamer, 2012). To engage in LEM, leaders must assess the emotions of their subordinates on a regular basis and then engage in behaviors that will influence those emotions to help maximize performance. The purpose of this research was threefold: 1) to explore whether leader emotion management is a valuable competency to develop in military leaders; 2) design a LEM training program for junior leaders; and 3) evaluate that training. This paper provides results from focus groups with military leaders that highlight the benefit of training LEM concepts and how such training is different from other programs, such as resiliency training. Training design decisions, which are based on qualitative feedback from over 100 Soldiers during the training design phase, are also presented. Finally, the results of a training evaluation study conducted with 70 Army leaders are summarized.