Our Model
About Us
California Ecology Arborists' tree experts provide tree construction/protection reports, expert witness statements, tree root problem and cutting advice, tree risk assessments, view obstruction advice, and more. Registered Consulting Arborists (RCAs), Pest Control Advisors (PCAs) and ISA Certified Arborists with over ten years of experience with arboriculture, agriculture, and landscape. We work with passion. Located in Los Angeles, serving LA, Orange, Ventura, and San Bernadino Counties. Cities such as Pasadena, Beverly Hills, San Marino, & Calabasas. We even recently helped with the massive LA Wildfire recovery efforts.
Our Team
Killian Vendler📍 ISA Certified Arborist WE-14059A| RCA #889 | PCA #147436 | QAL #151925
Killian Vendler was raised on a Christmas tree lot and pumpkin patch, with vineyards running through his family history and his first job at a peach and cherry orchard. That early connection to the land sparked a lifelong interest in plants, trees, and environmental stewardship.
He earned his B.S. in Agriculture and Environmental Plant Science while wrestling at the collegiate level, combining academic rigor with the discipline and work ethic shaped through athletics. After college, Killian managed operations at Devil Mountain Wholesale Nursery, where he played a key role in establishing a new location in Morgan Hill from 2018 until mid-2020.
When the pandemic paused the industry, Killian pivoted—using the time to earn multiple certifications and pursue his passion full-time as a certified arborist. Today, he brings both technical expertise and deep-rooted field experience to every case.
At CalEco Arborists, Killian leads with a clear mission: to help clients navigate landscape loss, tree disputes, and wildfire recovery through accurate, defensible appraisals and expert witness support. Under his direction, CalEco Arborists offers a full suite of consulting services including tree and landscape appraisals for insurance and litigation, tree construction reports, protected tree removal permits, risk and root assessments, vegetation management and pest control (PCA/QAL licensed), view obstruction consulting, and storm damage investigations.
Killian believes arboriculture is about more than trees—it's about protecting people, property, and the environments we all share.
Jacob Goldin | Director of Business Operations
Jacob Goldin brings a versatile background in business strategy, client development, and operational leadership to CalEco Arborists. With over six years of experience in consulting, private equity research, and behavioral health operations, Jacob has a proven track record of driving sustainable growth through data-driven strategy and stakeholder engagement.
Raised in Los Angeles but shaped by summers spent on a small island off the coast of Maine, Jacob developed an early and lasting appreciation for rural landscapes and natural environments. A lifelong outdoorsman, he credits those formative experiences with instilling his belief that the way we care for trees, land, and open space is deeply tied to community health and resilience.
Jacob earned his B.A. in Philosophy from UCLA, graduating magna cum laude with a focus on logic, ethics, and critical thinking. His academic foundation reflects a broader passion for sustainability and systems thinking—an outlook he brings to every aspect of his work. At CalEco Arborists, Jacob supports operations, outreach, and organizational strategy with the goal of connecting expert arboricultural services to the communities and legal professionals who need them most.
He is especially passionate about bringing ecological awareness to urban environments and helping others recognize the value of trees—not only as natural assets, but as essential infrastructure. Through his role, Jacob seeks to bridge the gap between science, strategy, and stewardship.