About Us
Tier 1 Medical Resources started in Palo Alto, California while Dr. Peter Baumeister was completing Emergency Medicine Residency at Stanford Medical Center. Dr. Onur Yenigun has been an instructor with the labs and trainings since the beginning, also while training at Stanford as an Emergency Medicine Resident. What started out as an inquisitive dive into medical training potential has resulted in a high level, hyper-realistic medical training model unavailable anywhere else. Both served as instructors for the International School of Tactical Medicine with its founder, Dr. Lawrence Heiskell.
Meet the Team
Dr. Peter Baumeister, DO, CDR USN, FAWM
Tac-Med Bio Pete
Dr. Onur Yenigun, MD
Dr. Onur M. Yenigun brings a unique combination of military service, frontline medical expertise, and advanced academic training to the tactical training community. A physician specializing in Emergency Medicine, Dr. Yenigun earned his medical degree from the University of California, San Francisco School of Medicine and is board certified in Emergency Medicine. He currently practices in high acuity emergency departments, providing critical care and life saving interventions in some of the most demanding clinical environments.
Before pursuing medicine, Dr. Yenigun served as a United States Marine Corps infantryman, where he developed the leadership, resilience, and operational mindset that continue to shape his approach to training and emergency response. His military background, combined with years of experience managing trauma, medical emergencies, and crisis situations, provides a rare perspective on performance under pressure.
As an instructor, Dr. Yenigun specializes in bridging the gap between tactical operations and evidence based medical care. His training focuses on practical, real world application of trauma management, emergency decision making, team coordination, and casualty care in high stress environments. Whether teaching military personnel, law enforcement professionals, first responders, or responsible civilians, he emphasizes skills that improve survivability, effectiveness, and confidence when seconds matter most.
Dr. Yenigun’s mission is to equip students with the knowledge, mindset, and medical capabilities needed to perform decisively in critical situations, drawing from his experiences as both a Marine and an emergency physician on the front lines of modern medicine.
Jeff Brant, Engineer
Jeff Brant is the engineer for Tier 1 Medical Resources. He designed and built the perfusion system the team trains on — the platform that puts hands on tissue that bleeds and holds pressure rather than on a plastic manikin — and he maintains it so that what happens on the table behaves the way it will when it counts.
He brings three decades of engineering to that work. Jeff holds a BS and MS in Electrical Engineering from the University of Oklahoma, where he spent seven years at OU's Electric Vehicle Research Institute. His graduate research developed a Local Area Augmentation System for the Federal Aviation Administration — ground-based augmentation that sharpens GPS accuracy enough to guide an aircraft through a precision approach in poor visibility. He carried it from design through FAA compliance to a working installation at the (KOUN) Norman, OK airport and logged more than 200 flight hours flying precision approaches to validate it. It became his thesis. During those same years, as Dr. Fagan’s Lead Graduate Assistant, he ran the institute's solar car and electric formula race programs each semester.
His career has been spent on systems where failure has consequences. At L3 Communications he designed RF, signal, and power distribution for KC-135 reconnaissance aircraft. At Brunswick he served as senior electrical systems engineer and mechatronics technical lead, developing the electronic control units behind Zeus and Axius — an autonomous, steer-by-wire, joystick docking, marine propulsion system — and holds U.S. Patent 7,941,253 for controller area network isolation. He sat on the technical committees that wrote the industry standards for steer-by-wire systems and the NMEA 2000 protocol. At Baker Hughes he was lead electrical engineer and project manager on a $15M research facility expansion, delivering a 3,000-horsepower dynamometer system to ISO specifications and a million dollars under budget. He later directed product development for a 36-person engineering organization, and today owns TekOrbital, a mechatronics company in Owasso, Oklahoma, building rugged embedded controls and hybrid power distribution for field equipment.
Jeff wrestled from kindergarten through college, finishing on the mat at the University of Oklahoma. Between that and thirty years of building equipment that has to work the first time in conditions nobody planned for, he understands what the training floor demands.
At Tier 1, his job is to keep the technology invisible. Military units, protective details, and first responders come to this team for Tactical Medical Training, not equipment troubleshooting. When the system simply runs, the cadre instructs and the training holds.
Elizabeth Baumeister, EMT
Our Clients
