Dr. Yeager has been with Valley Hope in some capacity since 2004. In her current role, she ensures that Valley Hope maintains its accreditation and licensing set by the Joint Commission and the seven states we serve. Tiffney is a licensed psychologist and licensed clinical addiction counselor. She earned a Bachelor of Arts in psychology from Creighton University, as well as a master’s degree in psychology and a doctorate in clinical psychology, both from the University of North Dakota. In graduate school, Tiffney spent nine months living and working on the Northern Cheyenne reservation, which she described as a wonderful and humbling training experience.