Supporting Arborists. Advancing Safety. Growing Knowledge.

Who We Are

The Ontario Commercial Arborists Association (OCAA) is a nonprofit organization dedicated to advancing the art and science of commercial arboriculture across Ontario. Since our founding, we have been a trusted voice for the arborist community, providing essential support, advocacy, and education for industry professionals.

At the OCAA, we believe that strong, healthy trees are the foundation of thriving communities. Our members are at the heart of that mission—trained professionals who are committed to safe practices, continuous learning, and environmental stewardship.

FIND AN ARBORIST

Search our directory of qualified OCAA member companies to find professional arborists in your area.

Day Of Service

Every spring, OCAA members roll up their sleeves for Arbor Day—volunteering crews, equipment, and expertise to help community spaces care for their trees.

It’s a day of giving back, connecting with peers, and swapping “tree stories” over a well-earned meal.

Know a non-profit in need?

Education

OCAA provides high-quality training and professional development for arborists at every stage of their career—through courses, webinars, workshops, and industry events designed to keep skills sharp and knowledge current.

Golf Tournament

The OCAA Golf Tournament is a great way to connect with industry peers, enjoy a day outdoors, and support the association. Open to members, sponsors, and guests—it's always a memorable event!

Stay tuned for details on our next tournament.

Fall Symposium

The OCAA Fall Symposium is our premier annual event, bringing together industry professionals for two days of learning, networking, and inspiration. With expert speakers, engaging sessions, and hands-on insights, it’s an unmissable event for anyone in arboriculture.

Check back soon for updates on the next Symposium!

Awards

OCAA is proud to recognize excellence and support growth in the arboriculture industry. From student bursaries to industry awards, we celebrate achievement and invest in the future of our profession.

Learn more about our awards and how to apply.

Committees

OCAA committees drive our initiatives, shape events, and support the arborist community. Whether you're passionate about education, events, safety, or advocacy—there’s a place for you to get involved and make an impact.

Discover our committees and how you can contribute.

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