Dr. Zirnstein completed her Bachelor oF Dental Science (BDS) from Vietnam, and had practiced prosthodontics for twelve years. She graduated the Doctor of Dental Surgery from University of California, San Francisco (UCSF). In recognition of her academic achievements, Dr. Zirnstein was inducted into the national dental honor society Omicron Kappa Upsilon (OKU) in 2007.

Dr. Zirnstein has joined Dr. Conrad and Associates since 2007 as a general dentist. She is a member of American Dental Association (ADA), Virginia Dental Association, Northern Virginia Dental Association and California Dental Association.