Kay has worked as a lactation consultant in 5 different hospitals. She has been providing educational programs for over 30 years. At the Philadelphia Department of Public Health her job was to assist the Philadelphia hospitals in supporting breastfeeding. Kay worked for the Pennsylvania Department of Health as the Coordinator of the Pennsylvania Breastfeeding Awareness and Support Program. Kay became an International Board Certified Lactation Consultant in 1985 and began a private practice.
Kay co-authored Candidiasis and Breastfeeding published by La Leche League. Barbara Wilson-Clay and Kay co-authored The Breastfeeding Atlas.
Kay served on the board of the International Board of Lactation Consultant Examiners for six years. Kay and Charlie are the parents of three breastfed sons and have three breastfed grandsons. In 2008 Kay became a Fellow of the International Lactation Consultant Association.