Dr. Muckle is the Chief Assessment Officer with the National Board of Certification and Recertification for Nurse Anesthetists (NBCRNA), based in Chicago, IL. In his career, Dr. Muckle has been responsible for overseeing the test development and psychometric quality of a variety of credentialing examinations. His work has included the development of innovative assessment formats (such as longitudinal assessment), consultation and steering of testing policy and strategy, and spearheading an assessment-focused research agenda. He brings 25+ years of experience in certification, test development and research to his present role. Tim has published numerous articles in testing-related scientific journals and publications and has been a regular presenter at meetings of the Association of Test Publishers (ATP), and the Institute for Credentialing Excellence, among others. Among his skills and qualifications are: strategic thinking and planning, organizational leadership, statistical analysis, research and publications, team building, innovative assessment formats, and volunteer service to the credentialing industry.