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125 Arborway
Boston, MA 02130


John S. DelRosso

Immediately after receiving my degree in forestry, I went to work for the Forestry Divsion of the Massachusetts Department of Conservation and Recreation, which introduced me to the importance of urban tree care. I spent eight years building my knowledge and experience working with several tree and landscape companies in the greater Boston area; I went from feeding a chipper to heading an Integrated Pest Management program, and eventually served as a sales consultant.

With fate and good luck on my side, I came to work at the Arnold Arboretum as an arborist in the winter of 1993. In 1998 I helped to initiate the Arboretum’s first plant health care program, and in the spring of 2002 I became head arborist. With the help of Bob Ervin and Ben Kirby, the arborist crew provides a full range of tree care to help manage and preserve the health of the living collections.

I have stayed active in the larger green industry as a board member for the MAA Examining Committee and a co-chair of the Tree Committee for Haverhill’s Brightside. I have acted as a consultant for parks departments in the cities of Haverhill and Lawrence, and have shared responsibility for the preservation of elm trees on Boston Common. I have been a guest speaker for the New England Park Ranger’s Association Annual Conference and the Rhode Island Nursery and Landscape Association’s Winter Show. I have also been an expert witness for litigation cases. Additionally, I offer my services as a consulting arborist for tree diagnostics and hazard identification and resolution, including pest and soil problems.

I enjoy teaching classes on a variety of topics related to the care of trees including; Pruning, Integrated Pest Management, Chain saw use and safety, and Planting and Transplanting.

In addition to working in the outdoors, I am an avid outdoor enthusiast. I enjoy hiking, kayaking, fishing, and bow hunting. I live in Haverhill, MA, with my wife of 25+ years. We have two beautiful daughters.


American Academy of Consulting Arborists
AAS, Natural Resources Forestry
Essex Agricultural and Technical Institute, Hawthorne, MA


Certified Arborist
Massachusetts Arborist Association
Certified Arborist
International Society of Arboriculture


Commercial Pesticide Applicator