Dr. Dan Irizarry, MD, is Tactical Medical Solutions Senior Medical Advisor. Retiring in 2018, “Dr. Dan” served 26 years in the US Army supporting medical and special operation force (SOF) organizations. Serving as the NATO SOF medical advisor, he designed and launched NATO’s first combat medical simulation center to train SOF medical personnel. In his final military assignment, he helped launch the DoD’s medical simulation acquisition and advanced development office in Orlando, FL. Today, he helps guide TacMed’s research and development efforts to ensure medical and simulation products meet the highest clinical standards.

In my current role, David works with civilian and military prehospital providers to improve resuscitation practices and patient outcomes from the point of injury to and through definitive care, including support for the implementation of dozens of prehospital transfusion programs across the country. He is a Registered Nurse with Flight and Ground Critical Care transport, ICU and ED experience, and have served as a Firefighter/EMT, Simulation Education Specialist and in multiple clinical leadership roles. His education includes a Master’s in Health Administration and a Bachelor’s of Science in Nursing. David is also a multigenerational Army Brat and a Marine Dad.

Randall M. Schaefer (Lieutenant Colonel, US Army, Retired), DNP, RN, ACNS-BC, CEN, served 20 years as an Emergency/Trauma Nurse in operational units and fixed facilities in clinical and staff officer roles. She deployed three times in support of Operation Iraqi Freedom and Operation Inherent Resolve. During deployments, she established and implemented prehospital blood programs and Walking Blood Banks at the unit and strategic levels. Upon retirement from Active Duty in 2017 until 2021, she worked at the Southwest Texas Regional Advisory Council (STRAC) developing and implementing the country's first multi- institutional, multi-disciplinary Regional Whole Blood Program. As the CEO of Schaefer Consulting, she has assisted over 40 EMS agencies in establishing prehospital blood programs across the country. Dr. Schaefer serves as a Steering Committee Member for the PHBTC and AABB Prehospital Standards Working Group Committee member.