Arborist Expert Witnesses

Arborist, Failure Analysis - Personal injury matters, Tree damage, Arboriculture, Tree failure investigations, Forensic arborist, Tree risk assessment, Tree disputes, Tree safety and biomechanics, Personal injury, Tree valuations, Insurance subrogation, Liability reports, Tree worker injury, Tree failure analysis, Tree failure investigation, Tree liability

Jason C. Miller is a forensic arborist and tree expert witness specializing in tree failure analysis, causation, and standard of care in arboriculture. He is retained in matters involving personal injury, property damage, and tree-related disputes, providing objective analysis and defensible opinions for both plaintiff and defense counsel. With more than 30 years of experience in the tree care industry, Mr. Miller has worked across all levels of arboriculture, from field operations to advanced consulting. His background provides practical insight into tree inspection, maintenance practices, and real-world limitations relevant to evaluating liability and risk. Mr. Miller is a Registered Consulting Arborist (RCA), ISA Board Certified Master Arborist (BCMA), Certified TreeCare Safety Professional (CTSP), and Licensed Tree Expert in New Jersey. His work includes site inspection, failure analysis, technical reporting, and expert testimony in legal proceedings. He has been retained in ...

Sacramento, California

Arborist - arborist expert witness, tree failure, tree risk assessment, ISA Board Certified Master Arborist, tree litigation, forensic arborist, California tree law, urban forestry expert witness, tree valuation, Wildfire Mitigation, vegetation management

Robert Warwick is a licensed attorney and ISA Board Certified Master Arborist (TX-4379BU) whose dual credentials position him among a rare class of expert witnesses capable of bridging the disciplines of arboriculture science and legal analysis within a single engagement. He is admitted to practice before the State Bar of California (No. 363124), the State Bar of Texas (No. 24148633), the District of Columbia Court of Appeals (No. 90036967), and the United States District Court for the Central District of California. He is the principal of The Law Offices of Robert Warwick, a Santa Clara, California civil litigation practice, and the founder of Everything Green, Inc., a California-based firm delivering vegetation risk, wildfire mitigation, and utility compliance solutions. Mr. Warwick earned his Juris Doctor from Golden Gate University School of Law in San Francisco in May 2024, where he served as Associate Editor of the Golden Gate University Law Review and as the Environmental La...

Port Angeles, Washington

Arborist, Environmental - arborist, tree risk, tree appraisal, tree valuation, tree forensics, urban forestry, trees and construction, tree protection, tree safety, tree policy, urban forestry policy

Owner and principal consultant with Peninsula Environmental Group, Inc., based in Port Angeles, Washington. A Board-Certified Master Arborist (since 2018), a Registered Consulting Arborist (since 2019), Tree and Plant Appraisal Qualified, and Tree Risk Assessment Qualified. My career in the environmental industry began in 2003; practicing as a full-time consulting arborist, forester and urban forester since 2015. Professional portfolio includes individual tree and forest-wide health, disease and risk assessments, tree management around construction, urban forest management, tree and forest policy development, forest management, environmental restoration and tree appraisals for both public and private clients. Have assessed tens of thousands of individual trees and numerous private and public forested sites up to 5,000 acres, with approximately 50% of work devoted to tree forensics and expert witness testimony related to plant appraisals, tree death, views, tree care, and injury/d...