About Us

Skilled and innovative team of tree care and landscape professionals

Capital Arborists, Inc. is a dynamic team of Certified Arborists and Landscape experts. We provide only the highest quality of care and maintenance. With Capital Arborists, you are assured the most skilled and innovative team of professionals.

Select a title below to learn more!

Certified Arborists and Tree Workers

To earn an ISA Certified Arborist® credential, you must be trained and knowledgeable in all aspects of arboriculture. ISA Certified Arborist® have met all requirements to be eligible for the exam, which includes three or more years of full-time, eligible, practical work experience in arboriculture, and/or a degree in the field of arboriculture, horticulture, landscape architecture, or forestry from a regionally accredited college or university.

isaMichael DuPont - Owner, Certified Arborist
ISA Certified Arborist # MA-0268
Jeff Alspaw - Owner, Certified Arborist
ISA Certified Arborist # WE-7986A
Lisa Venner - Owner, Certified Arborist
ISA Certified Arborist # WE-7070A
Stephen Williams - Certified Arborist
ISA Certified Arborist # WE-9542A
Christopher Hinrichs - Certified Arborist
ISA Certified Arborist # WE-10656A
Brian Nielson - Certified Arborist
ISA Certified Arborist # WE-5683A

Qualified Green Gardener

Hiring a Green Gardener today can help you save money, conserve water and sustain your healthy landscape. Qualified Green Gardeners have completed a minimum of 20 hours of hands-on instruction, passed a written exam, and have a valid business license and/or are an employee or owner of a company with a valid business license. Green Gardeners may have additional qualifications, licenses, certifications.

green-gardenerJeff Alspaw - Owner, Certified Arborist
Qualified Green Gardener
Lisa Venner - Owner, Certified Arborist
Qualified Green Gardener
Steve Williams - Certified Arborist
Qualified Green Gardener
Christopher Hinrichs - Certified Arborist 
Qualified Green Gardener
Scott Bonnet 
Qualified Green Gardener
Hector Lopez 
Qualified Green Gardener

Qualified Applicators License

State of California DPR Qualified Applicator License

qalMichael DuPont - Owner, Certified Arborist
QAL # 099692
Lisa Venner - Owner, Certified Arborist
QAL # 100487
Stephen Williams - Certified Arborist
QAL #130545
Christopher Hinrichs Certified Arborist
QAL #135170
Scott Bonnet Certified Arborist
QAL #137693

Contractor State License Board

State of California Contractor State License Board: D49 (Tree Care) C27 (Landscaping)

Michael DuPont - Owner, Certified Arborist
California State License Board: C27, D49