John Bornsworth is the owner and Principal at Peninsula Environmental Group, Inc., an ISA Board-Certified Master Arborist since 2017 and ASCA Registered Consulting Arborist since 2019; as well as an ISA Municipal Arborist and Tree Risk Assessment Qualified since 2014, ASCA Tree and Plant Appraisal Qualified since 2023, and Certified Erosion and Sediment Control Lead since 2019, with over 20 years of urban and community forestry management experience. John specializes in urban & community forestry planning and policy; tree forensics, pathology, risk management, and providing expert witness testimony.