Staff
Darya Barar
manages the HortScience | Bartlett Consulting (H|BC) office of 11 employees,
nine of whom are Certified Arborists with six are Registered Consulting
Arborists. During her tenure with H|BC Darya worked with the City of Menlo
Park on their Heritage Tree Ordinance update, the City of Vallejo on a street
tree ordinance update and is an on-call Arborist for the City of Berkeley.
Darya specializes in urban forestry management with 14 years of experience in
the municipal setting. She has particular experience in disaster management.
Darya has extensive experience working with community groups, state and local
agencies on tree ordinances, master plans and large scale tree replacement
projects.
Darya is a Certified Arborist (WE-6757A). View Darya's
curriculum vitae. You
can reach her on
LinkedIn or at
dbarar@bartlett.com
Pam Nagle
is a Certified Arborist with a background in landscape architecture. As an
arborist, she has surveyed and performed tree assessments for public and
private landholders throughout the Bay Area. She has recently advised the
Climate Action Now! (CAN!) organization in San Francisco on tree selection for
the Sunset Boulevard Reforestation Project, which involves SFPUC and SFDPW,
funded through California ReLeaf.
Her landscape career has included work on resort planning projects in the U.S.
and Canada, campus master planning, and landscapes for schools, commercial and
residential projects throughout California. Pam has extensive experience in
project management and team coordination, and has provided landscape design
and construction management for housing, streetscapes, trails and playgrounds
as well as SFUSD Green Schoolyards.
Having recently joined the H|BC consulting team, Pam is already immersed in
tree inventories, construction monitoring, and report preparation for housing,
schools, commercial redevelopment, and residential projects spanning most of
the compass points and micro-climates of the greater Bay Area.
Pam is an ISA Certified Arborist (WE-9617A), ISA Tree Risk Assessment
Qualified, and a Registered CA Landscape Architect (LA 5039). She also has a
University of California, Berkeley Extension, Landscape Architecture
Certificate a Bachelor of Fine Arts from New York University, Tisch School of
the Arts.
View Pam's curriculum vitae.
Jane Whitcomb joined HortScience | Bartlett Consulting in 1995. She specializes tree
assessment as well as mapping systems. Jane is familiar andexperienced in a
variety of landscapes in the Bay Area from oak woodlands to planted
landscapes.
View Jane's
curriculum vitae.
You can reach her on
LinkedIn or at
jwhitcomb@bartlett.com
Brenda Wong is an ISA Certified Arborist with a background in tree care consulting,
living wall horticulture, and retail horticulture. Brenda has experience with tree
inventory projects ranging in size from small homeowner properties to county
parks and city-wide inventories. She also has experience preparing tree
maintenance plans as well as report-writing and tree risk assessment.
View Brenda's
curriculum vitae.
Ryan Suttle comes to HortScience | Bartlett Consulting (H|BC) with a strong
arboricultural background on various utility vegetation management projects
on the West and East coast. He has experience conducting original and rigorous scientific research projects and presenting to international audiences.
He has expertise in utility vegetation management, technical report writing,
tree risk assessment, vegetation inventorying, and the intersection of arboriculture and technology.
View Ryan's
curriculum vitae.
Scott Stringer comes to HortScience | Bartlett Consulting (H|BC) with a over
20 years of municipal, commercial and residential arboriculture experience.
He worked to develop Municipal Forestry operations in Missoula, Montana
and Anchorage, Alaska. Scott worked as an Arborist Representative and Local Manager for Bartlett Tree Experts in the Chicagoland for over ten years
before joining the Hort/Science | Bartlett Consulting team.
View Scott's
curriculum vitae.
Nelda Matheny
is senior consultant at HortScience | Bartlett Consulting,
divisions of the F.A. Bartlett Tree Expert Company. She specializes in tree
evaluation and management, problem diagnosis and landscape plant
selection and suitability assessment. She has particular experience in
managing sites irrigated with recycled and low quality water, landscape soil
assessment and management, and plant evaluation and management.
For over 35 years, Nelda has been providing consultation for landscape
architects, contractors, owners, developers and public agencies to create
enduring landscapes. She is committed to providing advice and services to
promote healthy, sustainable and attractive landscapes. She helps clients
select plants that are well suited to the site and manage them to enhance
and protect environmental quality and conserve natural resources.
She holds a B.S. in Plant Science and an M.S. in Horticulture from the University of California, Davis and a Registered Consulting Arborist (#243).
Nelda is coauthor of five books including
Arboriculture: Integrated Management of Landscape Trees, Shrubs and
Vines
and
Trees and Development: A Technical Guide to Preserving Trees During Land
Development
which are used worldwide as a standard for successful tree
preservation. She presents lectures and training programs on
arboriculture, horticulture, and urban forestry throughout the U.S., Canada,
Europe, and Australia. Nelda has received numerous awards, including the
Alex Shigo Award for Arboricultural Education, is highly recognized by the
International Society of Arboriculture (ISA), and is an ISA Qualified Trainer
for adult training in classroom environments.
View Nelda's
curriculum vitae. You can reach her on
LinkedIn or at
nmatheny@bartlett.com
Dr. James Clark
is the Managing Consulting Arborist for Hort Science | Bartlett Consulting and
is an internationally renowned arborist. He has twenty years of technical,
research, and practical experience in tree risk assessment, tree preservation,
and urban forest planning and management. Jim developed a model of
sustainable urban forest management, is experienced in designing and
implementing field research, and frequently serves as an expert witness.
He holds a B.S. in Plant Science and an M.S. in Horticulture from Rutgers
University, and a Ph.D. in Plant Physiology from the University of California,
Davis, is a Certified Arborist (WE-0846), an ISA Qualified Tree Risk Assessor,
and a Registered Consulting Arborist (#357). Prior to joining
HortScience in 1991, he was a faculty member at the Center for Urban
Horticulture at the University of Washington and a professor at Michigan State
University.
Jim is coauthor of four books including
A Photographic Guide to the Evaluation of Hazard Trees in Urban Areas
and Trees and Development. He has published over 30 articles in
scientific journals including
Arboriculture & Urban Forestry (formerly,
Journal of Arboriculture),
Journal of the American Society of Horticultural Science,
Arboricultural Journal and
Journal of Environmental Horticulture, and lectures in arboriculture
and urban forestry worldwide. Jim received the Alex Shigo Award for
Arboricultural Education and is recognized internationally by the ISA.
View Jim's curriculum vitae. You
can reach him on
LinkedIn or at
jclark@bartlett.com
Scott Wheeler is a Board Certified Master Arborist who has been
climbing and caring for trees throughout the San Francisco Bay
Area since 2001. Scott has worked extensively with residential
homeowners, commercial enterprises, and city and state agencies
to develop and implement tree installation, removal, and
maintenance plans for private and public spaces.
He obtained his Qualified Applicator License through the CA
Department of Pesticide Regulation in 2009 and became a
Certified Arborist in 2010.
Scott managed a private tree care company in San Francisco from
2013 through 2024, and was accepted into the American Society
of Consulting Arborists in 2019.
He has been working as a consulting arborist since 2018 and was
recognized as a Board Certified Master Arborist in 2020.
Scott has appeared on several local news programs discussing
tree issues in the SF Bay Area. In 2018, he featured on an NPRaffiliated radio show, Work with Marty Nemko to discuss what life
is like as a professional arborist in San Francisco.
View Scott's
curriculum vitae.
Christina Canchola joined the H|BC team as a part-time Administrative Assistant, then eventually transitioned to full-time. Her primary responsibilities include assisting with client intakes, invoicing, and contracts, as well as taking care of other administrative needs. Christina also ensures that the monthly Financial Statements and billing are processed accurately and efficiently.
Having worked previously at Armanino LLP, Bio-Rad Laboratories, and THK America, Christina brings a wealth of experience to the team. She was born in Dallas, Texas, but raised in Richmond, California, which gives her a unique perspective and understanding of different cultures. Christina
holds a bachelors degree in business administration, with a concentration in accounting, from Sonoma State University.
View Christina's
curriculum vitae.