Dr. Ziebell is the Emergency Department Medical Director Dell Seton Medical Center at University of Texas, the only adult level 1 trauma center in central Texas. He is the Vice-Chairman of the Board of Trustees of the Seton Family of Hospitals and the chair of the Quality and Patient Safety Committee. He is also the Medical Director of Seton Medical Center at Circuit of the Americas and Executive Director of the Seton Event Medicine Institute. In addition, he serves on the Board of US Acute Care Solutions. He has served as Chief of Staff of the Seton Family of Hospitals in Austin, TX, and at Seton Northwest and Seton Southwest Hospitals.
Dr. Ziebell graduated his Emergency Medicine Residency at William Beaumont Hospital, Royal Oak, Michigan in 1993 and is a 1990 graduate of the University of Minnesota School of Medicine.