Our Staff

Dr. Liem received her Doctor of Dental Surgery (DDS) degree at the University of Southern California (USC). She believes in preventive care and educating patients on their oral health. She is committed to providing quality restorative and cosmetic dental work and continually learning the latest advancements in dentistry in order to provide patients the best possible care. She is a member of the American Dental Association, California Dental Association and Academy of General Dentistry. During her free time, she enjoys spending time with friends and family, discovering new restaurants, books, movies, and yoga.


Kathy has been working at Dr. Sie’s office for more than six years. She is a Registered Dental Hygienist (RDH) with a great technical skill and patient communication . She enjoys educating patients on their oral hygiene health, and making them feel comfortable during their visit. Her goal is to provide the highest level of care and help her patients maintain a healthy smile for a life time. 

Sonia Herrera

Sonia is a Registered Dental Assistant (RDA) and has been Dr. Sie’s primary assistant in the back office for almost ten years. She has more than twenty five years of back office experience and in addition, she is also able to help in the front office when we need her. When she does not perform chairside assisting, she works independently on patients as part of her RDA duties. She continues to attend continuing education to improve her knowledge and skills. She loves hiking, dancing and singing karaoke during her free time.

Angelica is a Dental Assistant (DA) and has been working closely with Dr. Sie and Dr. Liem as a chair side assistant. Even though she is the newest staff member in our office, she gets along well and is able to work together with the rest of our staff. She is a fast learner and a great addition to our office. On top of her full time job, she takes classes at a local community college hoping to finish her general education and ultimately continue on to earn a Bachelor Degree. 

Schedule your next appointment with us! (909) 364 - 8424