Meet The Board

DR. MARK SCHLESINGER, President & Co-Founder

Dr. Mark Schlesinger received his Doctorate in Dental Surgery from the New York University College of Dentistry, where he graduated at the top of his class. He was elected into the Omicron Kappa Upsilon Dental Honor Society and graduated with distinction as the recipient of the Quintessence Award for Outstanding Achievement in Periodontics.

Dr. Schlesinger went on to complete an additional three years of extensive specialty training in the prestigious Advanced Education Program in Periodontics and Implant Dentistry at the New York University College of Dentistry.

As a result of his exemplary leadership skills, he was elected as the Chief Resident of the residency program and upon graduation was honored with both the Leadership and Clinical Excellence Awards, historically given to two graduates, rather than one.

After completing specialty training, Dr. Schlesinger became a Diplomate of the American Board of Periodontology. A Diplomate is a periodontist who has made significant achievements beyond the mandatory educational requirements of the specialty and who is certified by the American Board of Periodontology.

He currently holds the position of Clinical Assistant Professor on both the graduate and post-graduate level at the New York University College of Dentistry. In addition to his role as clinical instructor, Dr. Schlesinger teaches the course Introduction to Clinical Periodontics to the residents.

Dr. Mark Schlesinger maintains a practice specializing in Periodontics, Implant Dentistry and Laser Dental Surgery at 30 East 60th Street, Suite 703, NY, NY, 10022. Visit the NY Laser Institute or the NY Laser Institute Blog to learn more about laser dental surgery.

Email Dr. Schlesinger

DR. MICHAEL LEIFERT, Vice-President & Co-Founder

Dr. Michael Leifert received his Doctor of Dental Surgery degree from New York University's College of Dental Medicine in 2002.  He obtained his specialty certification in Orthodontics, in 2004, from the School of Dental and Oral Surgery at Columbia University.  While attending his post-doctorate residency program, Dr. Leifert also served as president of his orthodontic class and as a teaching fellow for the pre-doctorate dental students.

Following his orthodontic residency, Dr. Leifert joined his father Dr. Melvyn Leifert in private practice in Greenwich Village, N.Y.C.  His wife, Dr. Ronniette Leifert, who is also an Orthodontist has now joined Michael and his father in their private practice.  Dr. Leifert holds a faculty appointment as an Assistant Clinical Professor at Columbia University College of Dental Medicine, Division of Orthodontics.  He has served on the New York County Dental Society’s Membership Committee, Communications Committee, Ethics Committee, and Continuing Education Advisory Committee.  Dr. Leifert has published continuing education articles and has lectured extensively to dental students at Columbia University as well as New York University College of Dentistry on behalf of the New York State Dental Association.  He has also volunteered to provide public oral cancer screenings for the New York County Dental Society and has served at the Greater New York Dental Meeting participating on the Publications Committee, Exhibits Committee, and Entertainment Committee. 

Dr. Leifert is also a Diplomate of the American Board of Orthodontics, and a Fellow of the College of Diplomates of the American Board of Orthodontics and the Pierre Fauchard Academy of Dentistry.  He is a member of the American College of Forensic Examiners, The International Society of Police Surgeons, and is an active member of the following organizations:

American Association of Orthodontics
American Dental Association
New York State Dental Association
New York County Dental Society
Pediatric Dentistry and Orthodontics Study Club
New York Academy of Orthodontics (Treasurer)
The Dental Study Club of New York (President)
The New York Academy of Collaborative Dentistry (Vice President and Co-Founder)
The New York City Medical Reserve Corps
NYUCD Alumni Association (Director)
Columbia University College of Dental Medicine (Executive Committee)
Donated Dental Services
Alpha Omega Dental Fraternity

Dr. Michael Leifert maintains a practice specializing in Orthodontics at 30 Fifth Avenue, NY, NY, 10011. The telephone # is 212-533-7880. The website is

Email Dr. Leifert


DR. JASON HOLDEN, Treasurer & Co-Founder

Dr. Holden received his dental degree from the University of Pennsylvania and completed his advanced specialty training in prosthodontics at the New York University College of Dentistry.  During his 3 year specialty training at NYU, he was selected to serve as Chief Resident as well as to receive the Kenneth Adisman Award for Excellence and The Harold Litvak Fellowship. He has written technique articles and his research on all-porcelain crowns has been recently published in the Journal of Prosthodontics

He currently holds an appointment as Clinical Assistant Professor at New York University College of Dentistry where he lectures on esthetics and implant prosthodontics. He is an active member of American Dental Association, New York State Dental Society, New York County Dental Society, New York Academy of Dentistry, and the American College of Prosthodontics as well as a founding member and Treasurer of the New York Academy of Collaborative Dentistry.

Dr. Jason Holden maintains a private practice specializing in cosmetic, implant and reconstructive dentistry at 509 Madison Avenue, Suite 2100, NY, NY, 10022. The telephone # is 212-753-3723. The website is

Email Dr. Holden


DR. SARA KIM, Secretary

Dr. Sara Kim earned her bachelors degree at Columbia University and her doctorate degree at the University of Pennsylvania School of Dental Medicine. Upon graduation, she returned to New York City where she completed an endodontic residency and received her Certificate of Endodontics at Columbia University College of Dental Medicine. She is board eligible for the American Board of Endodontics. Dr. Kim has published her research in the Journal of Endodontics and presented at national meetings. She is a member of the American Association of Endodontists and American Dental Association. She is originally from Edison, New Jersey, but currently resides in New York with her husband.

Email Dr. Kim