Meet Our Pleasanton Dentists

Jacob DeVinney, DDS

Dr. Jacob DeVinney has the ultimate "patients" as he and his dental staff create magical smiles. He has moved to Pleasanton and has acquired Amador Dental & Orthodontic from Dr. Craig Sjoberg, who will shift from his current role at Amador Dental into retirement.

Upon six years of service in the U.S. Navy as a Hospital Corpsman and ENT surgical technician, careful consideration and a career shift beckoned Dr. DeVinney back to school. Graduating from Cal State University, Dominguez Hills, Summa Cum Laude, with a B.S. degree in Biology, he then earned his dental degree from Herman Ostrow School of Dentistry at USC.

Dr. DeVinney enjoys spending time with his family, and is always looking for ways to give back. He, his wife, a respected physician, and their two children, reside in Pleasanton. He is overwhelmed with the friendliness in Pleasanton, where folks gather together to celebrate their community and generally take care of one another. As a family-oriented town, Dr. DeVinney knows that this is the right place for his practice, and to raise his family.

As the new dentist in town, Dr. DeVinney, with his own award-winning smile and hospitable demeanor, welcomes new friends and patients. Understanding how daunting a dental visit may be, Dr. DeVinney provides gentle dentistry, carefully explaining each procedure so that his patients are comfortable and confident with the dental procedures and the experience.

Marzieh Karkhanechi, DDS

Dr. Marzieh Karkhanechi received her Bachelor’s degree from University of California, Davis after which she moved to New York to attend the prestigious New York University Dental School where she earned her Doctor of Dental Surgery (DDS) degree in 2003.

Dr. Karkhanechi gained experience practicing general dentistry for several years prior to entering the Orthodontic residency program at NYU where she completed her post-doctoral education in Orthodontics and received an Orthodontic Specialty Certificate. After graduation, she moved back to California and started her orthodontic career in the bay area.

Dr. Karkhanechi feels extremely privileged to be working in the field of Orthodontics where she has the opportunity to create beautiful smiles and ultimately be rewarded by her patient’s satisfaction. Her goal as an orthodontist is to give every child, adolescent and adult a healthy, beautiful smile.

Dr. Karkhanechi constantly strives for excellence in her professional life. She embraces todays advanced techniques and stays up to date on the latest orthodontic and dentofacial orthopedic advances by attending numerous continuing education courses and subscribing to relevant professional journals.

Her research has been published in the leading scientific journal, Angle Orthodontist.

Dr. Karkhanechi aims to deliver a higher level of care that fits each individual’s needs. She sincerely appreciates the trust her patients and their families place in her and her team to provide their orthodontic care.

She is a member of several dental organizations:

  • American Association of Orthodontists
  • Pacific Coast Society of Orthodontists
  • American Dental Association
  • California Dental Association
  • Contra Costa Dental Society

Dr. Karkhanechi currently resides in Danville with her husband Sam and her two sons Darian and Daniel. When she is not working, she enjoys playing the piano, yoga and going on biking trips with her family.

Shayna Rondon, DDS

"As my patient, you can expect compassionate, quality care. I strive to stay updated on the newest and latest technology, and will provide an overall treatment plan to restore your gums and teeth back to health."

Dr. Rondon graduated from Southern Adventist University in 2002 with a B.S. in Business Administration and went on to Loma Linda University School of Dentistry and earned her doctorate of dental surgery in 2008.

In 2009, she completed a General Practice Residency at the Loma Linda VA Hospital and received extensive training in providing care in a hospital and operating room environment. In 2012, Dr. Rondon completed a residency in periodontics at the University of Detroit Mercy and St. John Providence Hospital, where she led as chief resident and also received a M.S. degree.

She is a Diplomate of the American Board of Periodontology (Board Certified) and a member of the following organizations:

  • American Academy of Periodontology
  • California Society of Periodontists
  • American Academy of Osseointegration
  • American Dental Association
  • California Dental Association
  • Southern Alameda County Dental Society
  • Christian Medical and Dental Association

In her free time, Dr. Rondon enjoys spending time with her husband, Aaron, and her kids, Gia and AJ. Her other hobbies include reading, yoga, playing the harp and piano. She also loves to travel and give back through mission service and outreach.

M. Nicole Jamali, MD

Dr. Jamali, a Stanford graduate, was the youngest physician to sit on the Board of Commissioners of the Joint Commission. She is an Internal Medicine Physician, with medical device patents in the field of safety and quality, but she still manages to run her busy thriving private practice.

As a leading figure in a movement of minimally invasive beauty procedures, and developer of her own medical grade skincare line, she knows how to integrate her medical knowledge with her love of art and beauty and blends it into all of her products. Behind her public persona, she is a dedicated wife and a mother of two.

"There is a solution to every problem, we just have to find it. Treat, care and respect your patients as you would your own family."

Contact Amador Dental & Orthodontic

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Office Hours

8:30am - 6:30pm
7:00am - 4:00pm
8:00am - 5:00pm
8:30am - 5:30pm
8:00am - 5:00pm
*Every other Friday.