Dr. O'Neill originally hails from Baltimore, Maryland, but more recently from York, Pennsylvania. She completed her doctorate of veterinary medicine at Ross University School of Veterinary Medicine, finishing her clinical year at Colorado State University's College of Veterinary Medicine. She and her fiancée share two dogs (Hot Pocket and Sprout) and two cats (Whisper and Red).

Professionally, Dr. O'Neill has strong interests in physical therapy/rehabilitation, oncology, and geriatric medicine, but outside of work, you can typically find her reading, rock climbing, hiking, or other various outdoor activities.