California Ecology Arborists
Serving Los Angeles, Ventura, San Bernardino, and Orange Counties
About Us
California Ecology Arborists' tree experts provide tree construction reports, expert witness statements, tree root problems 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 in arboriculture, agriculture, and landscape. Located in Los Angeles, serving LA, Orange, Ventura, and San Bernardino Counties. We work with passion, dedication, and empathy.
Our Executives
Killian Vendler ISA Certified Arborist WE-14059A| RCA #889 PCA #147436 | QAL #151925
I grew up visiting our Hungarian family vineyard in the summertime. My family also had a pumpkin patch and Christmas tree business that I worked on throughout my childhood. I love Christmas trees and have sold them every season for the past twenty years. In my tumultuous teenage years, I became deeply involved in plant science because I found peace within plants and flowers.
I graduated with a B.S. in Agriculture and Environmental Plant Science at Cal Poly SLO, where I wrestled Division 1. I received a full athletic scholarship and the 2018 Coaches Award for my exceptional performance as a student-athlete. While in college I worked for three years at the campus arboretum cultivating holiday poinsettias in the fall and selling them, along with Christmas trees, at various venues throughout the state. I also owned over thirty beehives and sold my honey at the local, famous, San Luis Obispo farmers' market. I earned a small academic scholarship in insect ecology, three Dean's List honors, and a President's List honor. I even tried to start a recycling company named Mack's Recycling.
After college, I managed operations at Devil Mountain Wholesale Nursery, a multi-location, large-scale nursery business spanning the West Coast with one of the largest plant inventories in the market. I played a key role in establishing their new location in Morgan Hill from 2018 until mid-2020. I was their qualified applicator and the responsible person for all pesticide-related activities, which were mainly conducted on weekends. On the weekdays, I drove box trucks, sold plants, managed a crew of over 25 people, oversaw will-call, took inventories, and built critical nursery infrastructure.
During the pandemic, I used my time to earn professional certifications and pursue my passion as a certified arborist and pest control advisor. Today, I bring technical expertise, education, business experience and hands-on field training to every case I take on with the same discipline and dedication I learned from wrestling.
I started my arborists business between 2022 and 2024, starting small and working my way up to higher-level tree consulting. I earned my Registered Consulting Arborist credential in 2025, further solidifying that my professional qualifications match the depth of my hands-on experience and technical expertise in arboriculture. My goal is to use my experience to make your issues with trees, pests, and plants easy to handle.
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 in him the 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 to connect expert arboricultural services with the communities and legal professionals who need them most. He is especially passionate about raising ecological awareness in 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.
Brian Chang | Marketing and Outreach Coordinator
Brian Chang’s journey is grounded in both academic insight and lived experience. He holds degrees in Sociology and Marketing, earning his Marketing degree from James Cook University Singapore with additional credits and a storytelling credential from the Royal Melbourne Institute of Technology. This foundation in social understanding, strategy, and narrative skill allows him to craft content and outreach strategies that connect communities, ideas, and audiences in meaningful ways.
His connection to the natural world has been equally formative. From reforesting degraded lands in Costa Rica to hands-on efforts to repopulate leatherback sea turtles, Brian’s conservation work reflects a lifelong commitment to protecting people, wildlife, and the environments we share. He lived for three years immersed in Malaysia’s ancient jungles and spent time in Melbourne, experiences that deepened his appreciation for biodiversity, natural beauty, and sustainable living.
Beyond conservation, Brian has supported community welfare initiatives in Singapore, assisting underserved populations, including the elderly and economically disadvantaged. He also has professional experience as an optician, where he cultivated precision and client care.
At CalEco Arborists, Brian applies his combined background to ensure the company’s messaging, client engagement, and community outreach reflect the values of stewardship, sustainability, and connection to the natural world. He believes that effective communication is not just about sharing information—it’s about building understanding, trust, and lasting relationships.