ISA Certified Arborist logoJohn Duffy, ISA Certified Arborist

Territory and Services:

John is an ISA Certified Arborist, operating out of SavATree’s Middleton, MA branch providing comprehensive tree, shrub, lawn, tick and deer services to Topsfield, Beverly, Manchester by the Sea, South Hamilton, Gloucester and Wenham, MA. Some popular services offered by John and the team include tree removal, tree pruning, tree and lawn fertilization, tree and lawn disease management, shrub services such as shrub trimming and disease treatments, organic lawn care and other organic treatment options, lawn seeding, lawn aeration, pest control including our organic tick and mosquito treatments and deer repellents. If you need any professional care to keep your property healthy, safe and beautiful, look no further than the experts at SavATree. Our arborists are highly trained professionals and John and the Middleton, MA team possess expertise specific to dealing with conditions that occur in Essex and Middlesex Counties in Massachusetts. Call John today and schedule a free consultation to create a customized tree, shrub and lawn care program suited to your needs and wants!

Email: [email protected]
Phone: (978) 739-2300


John has a degree in History with a focus in Environmental History of the U.S. from Trinity College in Hartford, CT.


John has been working on landscapes since 2008. He worked at a company creating organic compost/fertilizer and has been with SavATree since 2014. He worked as a Plant Health Care Specialist and General Tree Care Technician before becoming an arborist.

Industry Involvement/Awards/Certifications:

  • ISA Certified Arborist
  • MA Pesticide Applicator’s License
  • EHAP Certified


John lives in Ipswich, MA and enjoys fishing, hiking and boating.

Why He Became an Arborist:

“I became an arborist because I love working with trees and hope to preserve our natural landscapes for future generations.”

Customer Service Philosophy:

“I want my clients to be treated as I would hope to be treated — with respect, honesty and a sincere appreciation for nature.”

Social Network:

Click here to connect with John on LinkedIn!


Observations in the Field:

Giant Ichneumon Wasp – Manchester by the sea, MA

August 12, 2021 – Stumbled across this beautiful (but large and unsettling) female wasp this afternoon. Upon onspection of the declining tree I notice the wasp ovipositing eggs. The tree had many other stress factors but definitely a contributing factor was the Horntail wasp larvae that this Ichneumon wasp was trying to find!

Shoot Dieback on Evergreen Tree’s – Beverly, MA

August 5, 2021 – I have been seeing this type of dieback a lot in the past few years as clients become worried their young tree’s are dying come Spring. Classic example of White Pine Weevil or Engelmann Spruce Weevil, this species can affect a variety of young evergeens but their damage is limited to the tip of the main shoot and the tree is otherwise healthy.

Girdling Root in South Hamilton, MA

August 5, 2021 – In reviewing a new lawn clients property I noticed a declining tree along the driveway, upon further inspection there was a very large girdling root and the tree will have to come down, but we are excavating the roots of the other Maples in the row.


Territory List:







Pigeon Cove

Prides Crossing


S Hamilton

South Hamilton