John Sherwin is a board certified doctoral clinical scientist with more than 25 years of experience. He holds licenses in both California and New York. Dr. Sherwin has more than 50 scientific publications. He has held positions as laboratory director, senior technical director, general manager, and chief operating officer of multimillion-dollar reference laboratories. During his career he has also been a consultant to a variety of businesses and physician practices. He is active in the American Association for Clinical Chemistry and is the current Past-President. He is a past president of the National Academy of Clinical Biochemistry. He is also active in the Association for Public Health Laboratories and is a member of the Newborn Screening Committee. He is a member of the International Society for Newborn Screening. Dr. Sherwin is currently the acting Chief of the Genetic Disease Program for the California State Department of Health Services, which is responsible for the prenatal and newborn screening testing programs in the State of California.