Tree Forensics Expert Witnesses

Arborist, Arborist - Certified Arborist, Forester, Consulting Arborist, Tree Forensics, Tree & Landscape Appraisals, Tree Damage, Trees, Timber Trespass, Tree Risk Assessments, Forest Damages, Forest, Tree Health Assessments , Wildland Fire Damage Assessments

American Society of Consulting Arborists (ASCA) Registered Consulting Arborist (RCA) # 408, International Society of Arboriculture (ISA) Certified Arborist # PN 1068 A, ISA Tree Risk Assessor Qualified Pacific Northwest Chapter ISA Certified Tree Risk Assessor # 0150, Timber and Timberland Appraisal Course, USFS trained in forest fire fighting, root disease and animal damage identification, hazard tree workshop certified since 1978. Wildland fire 25 seasons experience in leadership roles, assessments of tree hazards and tree viability on fires and after fires. Over 40 years of field experiences. Servicing the western United States.

Arborist, Failure Analysis - Tree failure, Tree forensics, Tree health, Tree risk assessment, Consulting arborist, Plant appraisal and valuation, Tree biomechanics, Tree care, Plant Damage, Property damage, Damage.

Over 30 years of Green Industry expertise in all phases of tree care, including 18 years consulting with clients to diagnose tree health and safety concerns. Specializing in discovering causation, appraisal valuations, and expert witness services. American Society of Consulting Arborists (ASCA) Registered Consulting Arborist (RCA) #447. International Society of Arboriculture (ISA) Board Certified Master Arborist (BCMA) #PD-0358B. Longwood Gardens Certificate of Merit in Ornamental Plants - Series I & II

Arborist, Environmental - arborist, tree risk, tree appraisal , tree valuation, environmental restoration, habitat restoration, tree forensics

John Bornsworth is the owner and Principal of Peninsula Environmental Group, Inc., with 20 years of tree-related and natural resources experience. John specializes in urban & community forestry planning and policy; tree forensics, pathology, risk management, and providing expert witness testimony.  As of January 2021, there are 14 ASCA Registered Consulting Arborists (RCA) and 30 ISA Board Certified Master Arborists (BCMA) in Washington out of 417 ISA Certified Arborists. Only 7 individuals hold both the RCA and BCMA credentials together. Roughly 300 professionals hold both credentials nationwide, as of January 2021.  Attended and passed first Tree & Plant Appraisal Qualification training by ASCA. Less than 200 hold this credential nationwide, as of December 2023.  Routinely provide expert opinion and testimony on arboricultural, horticulture and vegetation management to areas of legal practice that include land use, real estate, trespass, negligence, and personal injury. ...