Rosemarie followed in the footsteps of her sister, Mary Ann, when she began dancing at the age of 3. During her competitive dancing career, she held the Eastern Regional Oireachtas title, then went on to become North American National Champion. Rosemarie successfully medalled at the All - Ireland and World Championships before retiring to join the cast of "Riverdance"
Rosemarie spent 4 ½ years touring the United States and Canada, before joining the cast of "Riverdance on Broadway" at the Gershwin Theatre. Rosemarie's other credits include: the National Irish dancing "Folgers" commercial with Liam Harney, NBC "Good Morning America", Radio City Music Hall, New York and Lincoln Center, New York, Westbury Music Fair.
Rosemarie graduated from Queens College – City University of New York in 1996 with a double degree in Economics and Sociology.