Meet the Team


Front Office Team

Diem Nguyen

Front Office Manager

Diem is a Seattle native who used to own a successful restaurant in the affluent Capitol Hill neighborhood before moving to the Bay Area to become an integral member and office manager of the Ueno Center. She loves to call Campbell her home as she loves the culture, people, and most importantly, the weather. She is an active member of AADOM (American Academy of Dental Office Managers) and takes pride in immersing herself in continuing education to ensure she can provide the best customer service for our patients. Her hobbies include spending time with her family, changing diapers, and thinking about working out. 


Tammy Kawamoto

Scheduling Coordinator

Bio coming soon!

Nicole Jones

Scheduling Coordinator

Bio coming soon!


Rose Lipkus

Financial Coordinator

Bio coming soon!


Lori Gomes

Treatment Coordinator

Lori is a Bay Area transplant who has an extensive background in multiple areas of dentistry. She is a registered dental assistant with over 10 years of experience as a surgical assistant in periodontics. As one of our treatment coordinators, Lori brings her experience in guiding patients through their treatment process. She really enjoys interacting with our wonderful patients and getting to know them personally! In her spare time, Lori loves to read, do crafts, and explore flea markets, garage sales, and thrift stores for treasures!

Brittany Aceves

Treatment Coordinator

Brittany started in the back office and worked as a dental assistant for 5 years before starting her path as a treatment coordinator. Brittany is a very friendly, high energy, positive person who loves to put a smile on every face she sees! She enjoys her team members so much that you can catch them together on and off the clock. She enjoys spending time in her hometown of Santa Cruz. Her hobbies include walking to the beach, going on hikes, exploring her growing talents in the kitchen, and shopping for trendy outfits.  

Jaimie Leonard

Professional Relationship Director (PRD)

Jaimie is our Professional Relationship Director. Acting as a personal liaison for our office, her purpose is to ensure effective and efficient communication between referring doctors and the Ueno Center in order to provide excellent patient care. A native of Sacramento, she has been in the periodontal field for over twelve years with experience in both the front and back office, making her a versatile asset to the Ueno Center team.  Jaimie is a true California girl at heart and loves living in South Bay. She enjoys being active and outdoors. Her hobbies include rock climbing, Pilates, reading, enjoying good food and spending time with her family.


Dental Assistants

Dora Porter

Back Office Manager and Implant Coordinator

Dora was Dr. Ueno’s first employee when the Ueno Center was Ueno Periodontics. She used to work in the field of endodontics before moving into the world of periodontics. She is married and has 2 beautiful daughters who look exactly like her. In her free time, she enjoys the different forms of martial arts and interpretive dance and is the top lip syncing performer in the office.


Gabriela Valencia

Lead Lab and Restorative Assistant

Gabriela is a proud Morgan Hill resident, however, she recently moved to San Jose. She loves dentistry and takes pride in making sure our patients look amazing with any restorative work we do in the office. In her spare time, she enjoys watching sports with her other half, leisure time with her family, and taking her dogs out for a morning run. Gabriela is delighted to be a part of the Ueno Center team and looks forward to treating you with the highest level of patient care.


Tanaya Mendez

Registered Dental Assistant and Restorative Assistant

Tanaya originally worked in restorative dentistry and made a smooth transition into Periodontics. Along with Gabriela, she leads the restorative and lab efforts of the Ueno Center as she is an artist when it comes to her temporaries. She is the proud mother of 2 wonderful children and loves to read in bed in her free time.


Gabriella Gonzalez

Registered Dental Assistant

“Gigi” is the life of the party and brings great energy to the office.  She loves interacting with patients and always puts a smile on people’s faces.  Along with being a great surgical assistant, she excels with technology and takes lead on our “digital impressions.”  In her free time, she loves to work out, ride her motorbike, and work on cars.  


Rebecca Garza

Sterilization Technician

Rebecca was born in Texas and came to live in California when she was about three years of age. She comes from a big family and she is a twin.  She’s lived in the Santa Teresa area all her life and enjoys having picnics and walks at the Almaden Lake in San Jose.

Rebecca also enjoys the outdoors by going hiking and trail running with her sister and her friends.  She also enjoys spending time with her family and especially her playful bunny Dulce.  Every spring she loves to volunteer and host a table at her church for the Ladies Spring Tea and invites her family and her friends.  One of her favorite plants is the hibiscus, in all different colors.


Dental Assistant

Bio coming soon!

Melissa Terry

Dental Assistant

Bio coming soon!


Amanda Mendiola

Dental Assistant

Bio coming soon!


Nancy Xin

Registered Dental Assistant

Nancy brings over 9 years of experience as a surgical assistant in Periodontics to our team. She takes time getting to know patients and providing them with the best care possible. Her role is to maintain a sterile environment, have everything prepared for doctors and keep patients happy and comfortable. During her free time, she enjoys working out, cooking and spending time with her family.


Dental Hygienists 

Dayna Hashimoto-Barao

Registered Dental Hygienist

Dayna has truly enjoyed all 13+ years of her dental career. She started as a dental assistant while completing her Bachelors Degree from UC Santa Barbara. Dayna then found a passion for dental education as she earned a Masters of Science in Dental Hygiene at UC San Francisco. She currently teaches in the Dental Assisting Program at Foothill College. Dayna enjoys working closely with her patients to provide individualized, gentle, and thorough periodontal treatment. When she is not busy cleaning teeth or teaching, she enjoys spending quality time with family and traveling.

Susan Quan

Registered Dental Hygienist

Originally from San Antonio, TX, Susan has been a clinical dental hygiene therapist since 1990 and is committed to helping our patients achieve their healthiest potential. She received her Dental Hygiene degree from the University of Texas, where she quickly developed a passion for periodontics. She later received a Master’s of Public Health from San Jose State University to understand health care in larger populations. Susan’s strong value for education also led to receiving her MBA, in which she is currently using to pursue entrepreneurial projects. Susan has helped to spearhead Ueno Center’s Oral Wellness Department because she believes that oral health is a key factor in living well. Through education and comprehensive oral hygiene services, her goal for every patient is excellent health. When she is not practicing dental hygiene, Susan maintains a very active lifestyle that includes running, cycling, kayaking, adventure travel, food, and photography. She also has a love for all animals, sports and volunteerism. Her current memberships include The California Dental Hygiene Association, The American Academy of Oral Systemic Health, The National Association for Professional Women, The Commonwealth Club and The American Red Cross Volunteer Corps.

Barbara Duncan

Registered Dental Hygienist

Barbara is a California native as she was raised in San Jose/Campbell. She currently lives in San Jose with her husband, two daughters and her large white dog, Tucker. Barbara has been a part of dental teams for 25+ years and dedicated herself to Dental Hygiene in 2005 when she graduated from Foothill College in Los Altos. She is proud to support her professional organization and serves as a board member of her local dental hygiene component. Barbara has volunteered in several community outreach programs to support dental health to children and underserved patients. When she is not working with her patients to improve their health she loves going to the beach, traveling and spending time with her family.

Ueno Center Dental Specialists
2160 S Bascom Avenue, Suite 1
Campbell, CA 95008-3297
Phone: 408-215-1460
Fax: 408-371-5616
Office Hours

Get in touch