About Brea Dental Group

Our Team


Dr. Gregory Peterson, DDSA graduate of the University of Colorado School of Dental Medicine. Today Dr. Peterson is a well-respected and active member of the American Dental Association, California Dental Association, and the Orange County Dental Society. Dr. Peterson earned his bachelor’s degree at the University Of California Los Angeles.
Dr. Peterson and his team at Brea Dental Group offer the highest level of care, providing patients with state-of-the-art technology and techniques for the utmost effective diagnosis and treatment. Dr. Peterson is dedicated to creating beautiful smiles and patient care.
Dr. Peterson has been married for several years and has two children he adores and loves spending time with. In his free time he enjoys playing beach volleyball, basketball, going to church, and family outings.


Jon Koh, RDH, Registered Dental Hygienist

Jon Koh, RDH, earned his Bachelor of Science in Dental Hygiene degree, with a Golden Scaler award, from West Coast University. He is certified in CPR, laser therapy, local anesthesia, and administration of nitrous oxide. He is commited to providing gentle and thorough dental hygiene care while creating long lasting patient-clinician relationships to all of his patients.  Today Jon is an active member of the American Dental Hygienist Association and California Dental Hygiene Association. Jon is also a Polynesian Dancer in his spare time performing all the way from LA to Orange County and Inland Empire. While he isn’t practicing his polynesian dances you can find him at the beach or traveling to different parts of the world. 


Rose Gallups, Registered Dental Assistant

Rose is a high quality, professional member of our staff. She has been with Premier Dental for several years and makes each patient feel like family. Rose is gifted in helping alleviate pain and bring our patients comfort.