ALBUQUERQUE, NM -- (MARKET WIRE) -- July 21, 2006 -- Exagen Diagnostics, Inc., which develops and commercializes genomic marker-based in vitro diagnostic (IVD) kits for predicting risk of recurrence or treatment response, today announced that it has filled three new director-level positions. John H. Adair, Jr. has been named director, quality; John Burns, Ph.D., joins as lead software architect; and Petra Schwartz has been named director, human resources. Adair and Schwartz will be headquartered in the company’s Albuquerque office, while Burns will be based in Houston, Texas.