Resume of John M. Phillips

Academic Background

June, 1973: B.S. Plant Sciences, University of California - Davis.
1974 – Present: U.C. Cooperative Extension short courses in various horticultural subjects.
1974 – Present: workshops sponsored by International Society of  Arboriculture and American Society of Consulting Arborists.
1992 – Present: Institute for Sustainable Forestry workshops.

Field Experience

1973 – 1987: Treeworker & Arborist, Sohner Tree Service, Inc., San Anselmo, CA.
(Tree pruning, repair & removal; tree condition analysis & treatment prescription; integrated pest management; tree value appraisal; expert witness testimony)

1987 – 1988: Arborist, Bartlett Tree Experts, San Rafael, Ca.
(Sales representative; consultations, diagnosis & appraisals)

1988 – Present: Self-Employed Arborist, Willits CA.
(Consultations, diagnosis, value appraisals & expert witness testimony)

1990: owner/partner, Northcoast Tree Care, Willits, CA.
(Tree pruning, repair  & removal)

Professional Affiliations

1980 – 88, Bay Area Landscape Supervisor’s Forum.
9/84 – 9/88, WCISA Arborist Certification Committee; Coauthored Pruning Standards.
1986 – Present, U. C. Tree Failure Report Program.
1987, Program Chair, 54th annual conference, WCISA, Santa Cruz.
1991, Program Coordinator, Trees in Our Future conference, Ukiah & Hopland, CA.
1992, Program Coordinator, Willits Friends of the Trees workshops.
1993, Program Coordinator, Beyond Basics in Arboriculture, Santa Rosa.
1994 – 95, Instructor at Mendocino College, Willits (Pruning Woody Plants & Introduction to Arboriculture).
1994, Coauthor Community Forest Management Plan, City of Ukiah, CA.
1997, Program Coordinator, Tree Biology Conference with Dr. Alex Shigo, Santa Rosa, CA.
Consulting Arborist for the City of Ukiah and the City of Willits.
Advisory Board of Institute for Sustainable Forestry, Redway, CA.
Consulting Arborist for Mendocino Co. ReLeaf.
International Society of Arboriculture Certified Arborist #106.
1984 – 2009, Member American Society of Consulting Arborists
1999 – 2009, Registered Consulting Arborist #253. (Registered Consulting Arborist is explained at


California Contractor’s License #698593
Insurance for property damage and personal injury to $1 million.
Certified Arborist #106  (Arborist Certification is explained at (Click on "Tree Care Information" and then "Why Hire an Arborist?")