Since 1995 Jacobszoon and Associates, Inc. has provided a wide range of professional forestry, natural resource, and land management consulting services to a diverse client base throughout northern California. Our core services include forestry consulting, biological and botanical assessments, ecological restoration, and water quality monitoring and management. Located in downtown Ukiah, we work with clients throughout Mendocino, Sonoma, Lake, and Napa counties on projects ranging from rural house site development to large scale industrial timber management and vineyard development. 


Internal Updates

  • Positions available on our Forestry Team. Check them out here.
  • New hire – Miles Hartnett - B.S. Degree, Environmental Science - Ecological Restoration - As a full time employee Miles will be joining the Water Quality team as an Environmental Technician.
  • New hire – Ashley Manheim - B.S. Degree, Environmental Management and Protection - As a full time employee Ashley will be joining the Water Quality team as an Environmental Technician.
  • New hire – Lowell Cottle - QSP and CESSWI certified, B.A. Degree, Environmental Geography - As a full time employee Lowell has joined the Water Quality team as a Senior Scientist.

Forestry Consulting

Water Quality Monitoring & Management

Lake and Streambed Alteration Agreements (LSAAs)

  • The California Department of Fish and Wildlife (CDFW) General Lake or Streambed Alteration Agreement for Activities Related to Cannabis Cultivation (General Agreement) has been Approved and is in Effect -
  • Certain post-fire recovery projects may qualify for emergency exemption under Fish and Game Code (FGC) 1610.


Jacobszoon and Associates, Inc. is an Equal Opportunity Employer.

To apply for an open position, please submit your resume to [email protected] and be sure to include the job title in the subject line of your email.

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