Erin O'Neill is originally from Arizona, but has lived in the Northeast for the past seven years. She graduated from the University of Arizona with a BS degree in physiology. She then worked at Seattle Children's Hospital as a certified nursing assistant prior to attending graduate school. She attended the University of New England in Portland, Maine and received her master's degree in health sciences as well as her physician assistant certification.

Erin is certified through the National Commission on Certification of Physician Assistants. She is a member of the American Academy of Physician Assistants. She maintains her Basic Life Support and Advanced Cardiac Life Support certifications.

She has been working as a physician assistant for the past five years in family practice, pediatrics and internal medicine. She has special interests in gastroenterology and women's health.