Performance psychology has increased in usage and popularity; however, we contend that within the elite spheres of the military, there is a need for research and development to fit the context and environment. In this study, we describe an explorative case study on the integration of mental skill training techniques to an advanced sniper course in the Norwegian Armed Forces. We evaluate the impact through triangulation and examine results on the course, perceptions of the participants, and observations from the instructors. In addition, we conducted a 1-year follow-up to get participants' experience of translating the skills beyond the course. The results show that the mental skill training package influenced both results and performance in a positive manner; however, as a novel field, further research is warranted to establish a best practice to enhance performance for elite military forces.