Our Valuable Team Members

Dr. John Peterman
Dr. John PetermanDentist
Born in Madison, WI, Dr. Peterman came to Boston in the fall of 1997 to play hockey at Northeastern University. He went on to Tufts University School of Dental Medicine and graduated in the summer of 2007. He and his wife, Kerri, a pediatric dentist, live on the South Shore. Dr. Peterman enjoys golfing, fishing, mountain biking, skiing, hockey, lawn games, and spending time with family and friends.
Martha Tyler
Martha Tyler
“I have worked in the dental field for 26 years. While I am new to the office, I had the pleasure of working with Dr.O’Keeffe many years ago at another dental practice. I enjoy working with the patients and helping them through all aspects of their visit to our office. While outside of the office, I enjoy spending time with my husband and our family.”
Sarah Palma
Sarah PalmaDental Hygienist
“In 2004 I graduated from Cape Cod Community College with a degree as a registered dental hygienist as well as a certification for administering local anesthesia.  I have worked with Dr. O’Keeffe for two years and enjoy coming to work every day.  I have established a great rapport and friendships with my co-workers and patients.  Daily, I provide dental cleanings to adults and children, take digital X-rays, do periodontal and oral cancer screenings, whitening, fluoride treatments and help educate patients to achieve optimal oral health. When at home my husband, Billy and I have three very busy children, Morgan, Andrew and Matty; along with my sweet dog Angel.”
Maryellen Sweeney Dumais, RDH
Maryellen Sweeney Dumais, RDH
The newest member of our team is dental hygienist Maryellen Sweeney Dumais, RDH. She joins us after practicing many years in a private practice in Milton, MA. She is a graduate of the University of Rhode Island where she earned a B.S. degree. She is an active member of her local community and enjoys spending time with her husband, Rick and her two children, Bradley and Danielle.

Claire Barnard
Claire BarnardDental Assistant
“I am Dr. O’Keeffe’s chairside assistant and enjoy talking with and getting to know the patients. When I am not in the office I enjoy interior decorating, family time, and traveling to Florida.”
Judi Knight
Judi KnightDental Assistant
“I am a chairside assistant and work with both Dr. O’Keeffe and Dr. Peterman. I am fairly new to the dental world and I really enjoy working with the rest of the staff at the office. My favorite part of the job is talking with patients and helping them feel at ease. I am an avid gardener, and love spending time with my two grown children.”