In three decades of practice, she has held positions as staff nurse, clinical nurse specialist, and nurse administrator at community and university-based hospitals. She has also held faculty positions at three prestigious universities. Throughout most of her career, Marie has practiced per diem as a staff nurse in nearly all sub-specialties of maternal-child health. Marie is the author of Breastfeeding the Newborn: Clinical Strategies for Nurses, now in its second edition, as well as several independent study modules, and patient education materials. She has also written more than 100 articles. In addition, she is a founding member of the United States Breastfeeding Committee and the past president of Baby-Friendly USA Board of Directors.