is a Principal Engineer at Exponent, Inc, a scientific and engineering consulting firm. Dr. Villarraga concentrates her practice in failure analysis of medical devices in the areas of product liability, intellectual property, regulatory compliance, quality control and manufacturing compliance. She has assisted companies with root cause analyses prior to a recall or as part of the investigation following a recall being announced.She recently contributed to various chapters in the book "Bringing your Medical Device to Market," including one on medical device recalls.