General Dentists

John J. Ahern

John J. Ahern

Dr. John J. Ahern was raised in Syracuse, New York. He graduated from the College of the Holy Cross where he captained the football team in 1980. He then received his dental degree from Georgetown University. While at Georgetown, Dr. Ahern received the prestigious Fixed Prosthodontics Award.

Dr. Ahern moved to New Hampshire in 1985 following dental school and purchased a practice from Dr. Gene Larochelle with fellow partner Dr. Sean Nichols.

Dr. Ahern has been very involved within the community for the last thirty years, from coaching at all levels, to being an active member of the Greater Derry Boys and Girls Club Board of Directors.

Dr. Ahern lives in Londonderry, New Hampshire with his wife, Karen. He has three sons; Ryan, Cory and Tim. Ryan is married to Kate and his youngest son Tim is currently at Tufts Dental School.

Dr. Ahern enjoys all sports and is always trying to perfect his golf swing.

Sean Nichols

Sean Nichols

Dr. Sean Nichols loves the dental practice he has helped to build here in Derry, NH. A dental office that is family oriented, supportive of the community, and available to everyone. He enjoys coming to an office where the atmosphere is fun, compassionate, and caring.

Dr. Nichols holds a degree from Providence College and Georgetown University School of Dentistry. He is a 30 year Board of Director of the Derry Boys and Girls Club of Greater Derry and is involved with several community charitable endeavors.

He enjoys all aspects of family dentistry and cherishes the long term relationships he has developed with his patients and their families. He takes pride in his staff and believes they are largely the reason for the tremendous success the practice has seen over his 33years.

He is also a partner of North East Mobile Dental Services, a group of dentists and allied health professionals allied in dental care to elderly in long term care facilities throughout the state. He participates each year in dental service trips with Remote Area Medical providing dental care to underserved and impoverished communities throughout the country.

He enjoys skiing, golfing, cooking, and traveling with his wife Donna and his three adult children Brendan, Kyle, and Alyssa and their spouses.

John Patrick Ahern

John Patrick Ahern

Dr. John Patrick Ahern was born in Essex Junction, VT, and raised in Marlboro, Mass. He earned a bachelor’s degree in biology from St. Anselm College in 1980, where he met and forged a friendship with the future Dr. Donald G. Hersey.

In 1984, Dr. Ahern graduated from Georgetown University School of Dental Medicine in Washington, D.C. He joined Dr. John J. Ahern and Dr. Sean E. Nichols as a partner in their Derry, NH practice in 1989.

Dr. Ahern was instrumental in the development of the Greater Derry Oral Health Collaborative School Based Dental Program and remains active today as an advisor and a provider. He also serves in an advisory capacity to the Dental Component of the Community Health Service, helping adults in need of low-cost dental care.

Dr. Ahern is a member of the International College of Dentist and the American Dental Association. He is active in the leadership of the New Hampshire Dental Society and is a member of the Granite State Study Club. He is CEREC Certified and completed certification in implant restorations through the 3i Corporation

Dr. Ahern and his wife, Kelly make their home in Londonderry, NH and are the parents of three adult sons Gregory, Brian and Martin.

Donald Hersey

Donald Hersey

Dr. Donald Hersey hails from Danvers, Massachusetts and Bucksport, Maine. He received his bachelor’s degree from St. Anselm College in 1981. Dr. Hersey graduated from Georgetown University School of Dental Medicine in 1985. Before moving to New Hampshire in 1983, Dr. Hersey practiced at the Total Dental Group in Waterford, Conneticut. While in Connecticut, Dr. Hersey received extensive training in the restoration of dental implants. In 2003, he earned his Invisalign certification, and recently reached Invisalign’s Premier-Provider level. He is also CAD/CAM Technology certified.

Dr. Hersey is a member of the American Dental Association and the New Hampshire Dental Society. He volunteers with the Alexander Eastman Foundation School Dental Program and the Community Health Service and is an active member of the Derry Rotary Club.

Dr. Hersey has four children; Megan, Erin, Sarah and Matthew. His spare time is spent playing golf wherever and whenever he can. Dr. Hersey is also a long standing member of Nashua Country Club.

Stephen Butterfield

Stephen Butterfield

Dr. Stephen Butterfield was raised in Derry, NH and graduated from Pinkerton Academy. He attended St. Anselm College where he graduated with distinction, Summa Cum Laude, with a Bachelor’s degree in biology. He received his dental education from the University of Connecticut’s School of Dental Medicine, graduating in 2004.

While in dental school Dr. Butterfield lead a dental mission trip to the Amazon River Basin in Peru. Following dental school, he completed a one year general practice residency at Hartford Hospital in Connecticut. Prior to joining the office Dr. Butterfield practiced in Bedford, NH.

Dr. Butterfield is excited about giving back to the community he grew up in. His dental knowledge covers all aspects of general dentistry for the entire family.

He enjoys hiking, mountain biking and spending time with his wife Gloria and son Benjamin.