Due to the inevitable changes that occur throughout society, training is a necessary component Homeland Security. However, training is frequently ineffective and inefficient because it is being implemented incorrectly. In order to maximize the benefits of training and ensure trainees are acquiring expertise, training must be applied appropriately. This article offers insights about the science of training and learning as well as several principles to help researchers and practitioners in designing, developing, implementing, and evaluating training. In addition, this article expands upon the benefits of using simulation‐based training, game‐based training, and on‐the‐job training as potential instructional techniques that can be utilized in Homeland Security.