In-situ clinical simulation is a highly effective vehicle to increase readiness. Readiness looks different for various healthcare professions and the roles they fill in clinical and operational environments. However, there are certain principles that transcend the ability of personnel to respond to emergency events across all areas of operation. The need to train personnel, test equipment, probe systems, and identify latent safety threats is universal. Through the process of building, executing, and debriefing simulation exercises, deficiencies are engineered out and teams build confidence and efficiency. They improve teamwork and communication. Clinical simulation trains individuals and teams how to target their readiness efforts to meet their specific needs. Cross training individuals to be able to respond and help in ever changing environments is critically important. All that is needed is additional training and opportunity to provide expanded emergency medical functions. Simulation is a method to train individuals and teams to the full scope of their knowledge, skills, and abilities in order to determine how best to utilize healthcare personnel. The hands-on programs include skills stations and simulation scenarios to train learners in mass casualty triage, trauma, psychological resiliency, lateral thinking, and resource utilization. Reserve and active duty learners include physicians, nurses, dentists, and corpsmen. The interprofessional team that plans and leads these trainings includes oral surgery, dentistry, clinical psychology, pharmacy, nursing, emergency medicine, trauma, and critical care/pulmonology. They hail from various DoD and VA facilities. Spearheaded by the dental profession, dentistry is demonstrating that they are capable of training not only their teams, but their other colleagues as well, thus demonstrating dentistry’s ability to contribute as part of a medically ready force. Improving and expanding these simulation programs lies in developing simulation champions from among the learners so that we can train people to maintain the clinical and operational readiness of their own teams. Leadership support of joint training evolutions is key to their success. Collaboration and sharing resources of space, equipment, and subject matter expertise between our organizations provides enhanced training opportunities for everyone. If we want to work together, we have to train together. Simulation allows teams to work through challenges, make mistakes, and creatively solve problems within a safe learning environment where there are no real-life consequences. To truly prepare teams for operational environments we have to adequately train them. Individuals and teams will have to decide how to use limited resources to keep the most people alive. They need to be resilient enough to continue to provide care under conditions they may have never experienced before. Doing the most good for the most people is a very different concept than how people are clinically trained where you exhaust every resource to save the most critically injured first and you have unlimited resources to do so. Simulation is critical to preparing our healthcare teams.