I have been a Certified Arborist since 1991 and actively involved with the Tree Care Industry for over 42 years. I am a Registered Consulting Arborist with the American Society of Consulting Arborist. In 2015 I retired as the assistant Division Head in the Urban Forestry Division for the City of Los Angeles which manages one of the largest street tree populations in the nation. Prior to coming to the City of Los Angeles I was the owner / operator of Neighborhood Tree Service and shortly thereafter I started consulting on a part time basis. In 1999 I started consulting on a regular basis and that’s when we changed our name to Neighborhood Consulting Arborist. Then, due to the increase in Court Case work we started our current company Tree Case Management in 2010.

Certified Arborist Near Me


We are a professional arboricultural consulting firm providing analysis, testimony, and litigation support experience in evaluating damages and developing cost appraisals. Clients include attorneys, corporations, government agencies, neighborhood councils, property managers, landscape architects, and professions within the construction industries. We have successfully completed over 1200 cases throughout California with experience ranging from wild land fire expert witness testimony to specialized landscape damage loss analysis, and tree root & infrastructure management conflicts.

We have extensive expert witness experience assessing fire damage and claims associated with over 200 cases in multiple fires throughout California. The assignments required extensive damage documentation, repair and mitigation cost analysis, and direct participation in mediations, settlement conferences, and court cases.

Greg Monfette, owner of Tree Case Management, has served as an expert witness performing forensic work for cases up to $20,000,000. He has testified at bench and jury trials, in over 80 depositions, and 40 mediations and arbitrations.


Tree Case Management (TCM) is dedicated to the enhancement of your community and the protection of the environment as the preeminent authority on legal matters associated with trees, root and infrastructure damage, tree preservation and retention, and tree and plant health, while ensuring through our expertise and objectivity the safety, preservation, functionality and beauty of your natural surroundings.

Trees in our developed environment present a challenge, requiring careful planning and vigilant maintenance. The shared public trust of governments, businesses and homeowners is to ensure that tree plantings grow, thrive and remain safe. When a problem occurs—if a tree causes damage or becomes a public safety hazard—a source for advice and mediation is often needed. This is the role of TCM to bring a comprehensive, objective viewpoint to the diagnosis, appraisal and evaluation of arboricultural issues.

As Registered Consulting Arborists we are called upon to advise in the most challenging situations that necessitate experience in the science and practice of arboriculture, as well as specific expertise in the practical, ethical and objective role of the consultant.

We strive to be the arboricultural experts of choice to assist law firms, insurance companies, utility companies, developers, municipalities, architects, landscape planners, homeowners, organization’s coping with disaster mitigation, and others requiring authoritative knowledge and perspective on trees and plant life. In addition to court case work, we specialize in root analysis, structural stability and the overall evaluation of the root collar area in determining various needs, or addressing various concerns. We perform our excavation with the use of an Air-Spade which uses a patented supersonic nozzle that focuses the air “like a laser beam” to break up the soil. The soil can then be easily removed from the excavation site without damaging the roots. Air exiting the nozzle is at twice the speed of sound (approximately 1300 mph) which allows for best digging conditions with the effort of tree preservation in mind, even in the hardest soils. And the best of all is that it is not harmful to the roots or the adjacent infrastructure.

At TCM we have the unique and unparalleled ability to…

-Provide expert witness testimony in cases involving damage or injury related to trees
-Provide analysis, testimony, and litigation support services in evaluating fire damage cases to determine loss valuations
-Conduct appraisals of tree value for property insurance claims
-Evaluate the environmental impact of land development
-Guide the long-term planning for placement and maintenance of trees
-Offer valuable information about the preservation of existing trees
-Inspect plant material to determine health and safety
-Educate the public, and public officials, about the
of existing trees
-Counsel homeowners on the evaluation, planning and preservation of trees
-Conduct root-crown-evaluations to identify underground conditions

At TCM we strive hard to serve our customers. In doing this we’ve established a policy to respond back to all request, inquirys, contact, emails and phone calls promptly.

We know your time is important and we wish to honor that while your spending this time with Tree Case Management.

Thank You,
Greg J. Monfette, Owner
Registered Consulting Arborist #481
(310) 902-6581

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