After Dr. Sean Rooney graduated Mahopac High School he attended the University of Buffalo, where he completed his pre-medical requirements and earned his Bachelor of Arts degree in Physical Anthropology. After college Dr. Rooney attended Columbia University School of Dental and Oral Surgery. In 2000 he graduated from Columbia and was asked to give the graduation speech. He was awarded the Leadership Award by the Dental Society of the State of New York in recognition of outstanding leadership as the Class President. After he completed an Advanced Education in General Dentistry program at Columbia in 2001 he returned in 2002 to begin a residency in orthodontics. In 2004 he became certified as a specialist in orthodontics and was chosen as a Chairperson on the Columbia University Orthodontic Alumni Executive Board. In 2007 Dr. Rooney completed his requirements and passed the exams necessary to be a Diplomate of the American Board of Orthodontics. Approximately, only 30% of orthodontist have completed the requirements to be a Diplomate.  

Dr. Rooney associated with orthodontic practices in Westchester County and New York City. Fortunately, in 2007 he and his wife Jennifer, returned to Mahopac where they completed their vision of opening an orthodontic practice in their home town. Their daughters, Emma, Addison and Lia will have the opportunity to be the fourth generation to live in this area.

Dr. Rooney was selected by his peers to be included in the list of top Dentists in the Hudson Valley area from 2007 to 2017. This list appears in the November issues of Hudson Valley Magazine.

He is currently the President of the Putnam County Dental Society and has held positions such as President of the Columbia University Orthodontic Alumni Executive Board and Chairperson of the New Dentist Committee for the 9th District.

Dr. Rooney is actively involved with several international, national, state, and local professional organizations which include: the World Federation of Orthodontists, the American Association of Orthodontists, the American Dental Association, the 9th District Dental Association.

He has lectured to dental and non-dental organizations on topics such as Invisalign, Obstructive Sleep Apnea, Advancements in Orthodontics.

His favorite activity is spending time with his family.  He enjoys training for triathlons and is on the organizational committee of the Mahopac Tyathlon. The Tyathlon is a triathlon to raise money for the Ty Louis Campbell Foundation.   Dr. Rooney is also a 2X Ironman triathlete.