Meet Our Team
John C. DiMaggio, DDS
Owner / Dentist
Dr. John DiMaggio is a gentle, compassionate general dentist who believes in honest, education-based care for patients of all ages. He enjoys using technology to help patients better understand their needs while maintaining an atmosphere of a small, family practice that feels more like a home rather than an office. He is proud and honored to have inherited the legacy of Drs David and Jewel Weiss as the new owner of DiMaggio Dentistry.
A lifelong learner, Dr. DiMaggio has completed hundreds of hours of continuing education in areas such as Invisalign and clear aligner therapy, implantology, root canal therapy, cosmetic dentistry, surgical extractions, and bone grafting. He is especially enthusiastic about digital dentistry and has advanced training in digital scanning technology. As an educator at heart, he takes time to explain treatment options clearly and help patients make confident decisions about their oral health.
Originally from the Midwest, Dr. DiMaggio grew up just outside of Chicago.
Dr. DiMaggio and his wife, An, currently live in Dobbs Ferry and enjoy being part of the Westchester community. He is honored to continue the Weiss Family Dental legacy of honesty, kindness, integrity, and meaningful care for all ages of the local community.
Education & Training
University of Illinois, BS Molecular Biology, Anthropology, and Archaeology (2006)
New York University, MA Biological Anthropology (2013)
New York University College of Dentistry, Doctor of Dental Surgery (2017)
NewYork-Presbyterian Brooklyn Methodist Hospital, General Practice Residency (2018)
Practiced in Brooklyn, Queens, the Hudson Valley, and Westchester
Professional Memberships
American Dental Association
Academy of General Dentistry
New York State Dental Association
Ninth District Dental Society
American Academy of Clear Aligners
Alex Mangini
Office Manager
Alex Mangini is our warm and personable office manager, who’s always ready to welcome patients in with a friendly smile. She keeps the office running smoothly and aims to make every visit as comfortable and stress-free as possible. Whether you’re scheduling an appointment or calling in with a question, Alex is happy to help. She loves getting to know our patients and making everyone feel comfortable from the moment they walk through the door.
Mariya Lebedeva
Dental Assistant
Mariya Lebedeva our dedicated dental assistant with hands-on experience in chairside procedures, digital imaging, and sterilization protocols. She works closely with Dr. DiMaggio to create a calm and comfortable experience for patients of all ages while upholding infection-control standards and contributing to efficient, high-quality care.
Winston
Office Mascot
Winston is our friendly office service dog at DiMaggio Dentistry.
He’s always ready with a wag and a warm greeting to put patients at ease. Winston is well-trained, calm around children, and helps create a comforting, low-stress atmosphere in the office while respecting hygiene and safety protocols, making visits a little brighter for everyone.
A Tradition of Care
After 30+ years of serving Briarcliff, Dr. David and Dr. Jewel Weiss retired in 2026.
David Weiss, DDS (retired)
Dr. David Weiss graduated from Ossining High School and received his DDS from Georgetown University in 1988 and his fellowship in the Academy of General Dentistry in 1990 whereupon he joined his dad, Dr. Sam, in private practice.
Dr. David became a clinical instructor at Columbia University School of Dental Medicine in the department of Oral Medicine. He is a member of the American Dental Association, the Academy of General Dentistry, and Alpha Omega International Dental Fraternity. Dr. David is consistently chosen as one of "Westchester's Top Dentists.
Prior Owner / Dentist
Jewel Weiss, DDS (retired)
Dr. Jewel Barron-Weiss, the daughter of a family practice physician, was raised in Hammond, Indiana – a short distance from Chicago. She graduated from Purdue University and then received her DDS from Indiana University School of Dentistry in 1987. After her externship in dentistry with the United States Coast Guard, Dr. Jewel started her own practice in the Chicago suburbs. She then relocated to New York in 1990 and joined Dr. David and Dr. Sam in private practice.
Children's dental education has been a priority in her practice for over twenty years. She consistently volunteers in our local parochial and public school districts teaching nutrition and dental hygiene. Volunteering for Special Smiles, a part of the Special Olympics, is also one of her passions.
Prior Owner / Dentist