A Naval Science Instructor is responsible for teaching and mentoring students in a high school Junior Reserve Officers' Training Corps (JROTC) program, typically focusing on leadership, naval history, citizenship, and military customs. They develop lesson plans, conduct physical fitness training, and guide students in drill and ceremony activities. Often retired military personnel, they serve as role models, instilling discipline, teamwork, and leadership skills. Their role also includes organizing extracurricular activities, such as drill competitions and community service events.