We are proud to have an exceptional group of dental professionals on our staff. Here is a brief introduction to each of the smiling faces you will see when you visit our practice.

Front Desk

Theresa Leydet

Theresa is the front desk coordinator/administrator in our office.  She has been working with Dr. Sinclair since 2009.  She brought her experience from previous office administrator positions.  Theresa will provide you with kind, helpful assistance whether you are scheduling an appointment, need to work on financial arrangements or have questions that need to be answered.

Theresa lives in Pittsfield with her husband.  She has two grown children.

Our Dental Assistants

Our dental assistants are critical to patient care. They are instrumental to making the course of treatment run as smoothly and comfortably as possible.

Carol Mierzejewski 

Carol has worked with us as a dental assistant since 2003.  Her past health care experiences go beyond dentistry.  She also worked as a surgical technician, a respiratory therapist and a private care giver.  Along with being a great assistant, Carol is a very caring person.  Our patients are fortunate to have her as a member of our staff.

Carol lives in Pittsfield with her husband.  She has two  children.

Kerri Priester

Kerri is our sleep apnea treatment coordinator.  She graduated from McCann Tech in 2007 with a degree in Dental Assisting.  Kerri works closely with our sleep apnea patients in developing the scheduling, billing and financial aspects of the treatment.  She is our liaison to the medical insurance companies and also an assistant in the General Dentistry division of the practice.

Kerri lives in Adams with her two children.

Our Dental Hygienists

Our hygienists are very knowledgeable. They assist Dr. Sinclair in designing individual treatment plans, and help provide you with information regarding your dental condition. Beyond helping you to maintain good oral health, they also complete oral exams and review your dental/medical history with you. They are proficient in doing oral cancer screenings and intra-oral and extra-oral head and neck exams. Our hygienists continue to raise the bar when it comes to the non-surgical treatment of periodontal disease.

Kathleen Prince

Kathleen has been with us since 2006.  She graduated from Hudson Valley Community College of Dental Hygiene in 1993.  She also has an undergraduate degree in Psychology from Framingham State.  Kathleen has been a great addition to our staff and has helped lessen the office stress in both a lively and professional manner. 

Kathleen lives in Lenoxdale with her husband and two children.

Kelly Moretti

Kelly received her associate degree in Dental Hygiene from Springfield Tech in 1984.  She has worked as a hygienist for Dr. Sinclair for over 25 years.  Dr. Sinclair relates that Kelly is not only a great hygienist but also a good friend.  She has added a very professional dimension to the office.  We have been very fortunate to have Kelly on our staff for all these years.

Kelly lives in Pittsfield with her husband and two children.


J. Terrence Sinclair, DDS
Cosmetic and Family Dentistry
Tel: (413) 445-7791  •  Fax: (413) 445-7532
207 First St  •  Pittsfield, MA 01201
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Cosmetic and Family Dentistry services for Pittsfield, MA and surrounding areas: North Adams, Springfield, Westfield, West Springfield, Great Barrington, Easthampton, Northampton.
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