Prior to establishing DHA, David was affiliated with the Oregon Museum of Science & Industry (OMSI) for 13 years, serving as associate director from 1988–1996. While at OMSI, David initiated and administered many of the museum's nationally recognized education and outreach programs, and also developed hands-on exhibits for national tour. David has also taught science and enrichment programs in grades 7-12, conducted research in plant biochemistry and radiochemistry, and worked for five years with the U.S. Fish and Wildlife Service. A native Oregonian, he is active in numerous scientific and educational organizations nationwide. He is a past member of the American Association for the Advancement of Science's Committee on Public Understanding of Science, is the past Director of Informal Science Education for the National Science Teachers Association (NSTA), served on the Board of Directors of the Biological Sciences Curriculum Study, the Keystone Center, and as Senior Science Advisor to the Council of Chief State School Officers (CCSSO), and currently serves on the Board of Directors for the Aspen Science Center in Colorado. In 2009 David was recognized with the NSTA Distinguished Service To Science Education Award
Kelly Riedinger, PhD, Director of Research and Evaluation, oversees the firm's full range of internal and external evaluations as well as ongoing research studies. In collaboration with other DHA team members and a broad range of public and private sector clients, she designs and implements front-end, formative, and summative evaluations and research investigations using both qualitative and quantitative methodologies. Her research interests focus on science teacher preparation and professional development as well as learning in informal science settings with a particular interest in learning conversations and the ways in which learners of all ages negotiate and construct identities as learners of science. She is active in numerous professional associations and societies and currently serves on the Informal Science Education Committee of the National Science Teachers Association. Prior to joining DHA, Kelly was an assistant professor of science education at the University of North Carolina Wilmington where she taught courses in elementary science methods and informal science education. Before that she served as a research associate on the NSF funded Project NEXUS, taught middle and high school oceanography and earth science and worked as an educator at the Virginia Aquarium & Marine Science Center. Kelly earned a BA in Biology at Wittenberg University in Springfield, OH; a MS in Oceanography from Old Dominion University in Norfolk, VA; and a PhD in Education Curriculum and Instruction with an emphasis on science education from the University of Maryland in College Park, MD.