Medical emergency preparedness, to include mass casualty, is often relegated to certificate, skills-based training like Tactical Combat Casualty Care and Advanced Trauma Life Support that occur at one to five year intervals (pending certifying body and operational requirements). While these courses are imperative and foundational, their infrequent and classroom-based model does not directly translate to medical team readiness. To achieve this, in-situ simulation training is needed where medical personnel are challenged to respond to an emergency utilizing the actual materials, equipment, and processes they would employ in a real-life event. Our team has piloted a joint clinical and operational emergency team training that achieves just that. Furthermore, ancillary, support and specialty medical service providers are often under-utilized in medical emergency response. In situations of distributed military operations and large scale civilian medical emergencies, manpower resources are finite and the demand will overwhelm the supply. Our training program is spearheaded by dentists and supported by physicians, surgeons, nurses, lab officers and corpsmen subject matter experts (SME). With our colleagues, we have delivered simulation-based training in mass casualty, medical emergencies, adverse events, triage, trauma, prolonged casualty care without resupply, expectant casualty care, and mental resiliency. The curriculum utilizes rapid cycle deliberate practice, experiential learning, skills sessions, and simulation scenarios. Additionally, by integrating local standard operating procedures, participants can test their processes and identify areas of improvement (systems probing and process improvement). Soft skills like closed loop communication, critical decision making, lateral thinking, and roles and resource allocation are also explored. We are bridging the silos between professions, federal organizations, military branches, and active duty and reserve to change the trajectory of the way we train, thus embedding joint in-situ simulation into the fabric of our teams. In order to improve the way, we as healthcare providers across organizations function together, we must train together. Collaboration and sharing resources of space, equipment and subject matter expertise between our organizations provides enhanced training opportunities for everyone. These partnerships benefit DoD and VA facilities and teams across the globe.