About the OCAA Day of Service
The Ontario Commercial Arborists Association (OCAA) Day of Service is an annual volunteer initiative that unites arborists, tree care companies, and industry professionals to give back to the community through skilled tree care services.

Held at a selected public or not-for-profit site each year, the Day of Service provides essential arboricultural work—such as pruning, removals, and safety assessments—at no cost to the recipient organization. This collaborative event showcases the generosity and expertise of Ontario’s commercial arborists while promoting the value of professional tree care.

More than just a day of work, it’s a celebration of industry pride, environmental stewardship, and community spirit.

About the OCAA Fall Symposium
The Ontario Commercial Arborists Association (OCAA) Fall Symposium is an annual professional development event designed to support and elevate the commercial arboriculture industry across Ontario.

Bringing together business owners, field professionals, students, and industry experts, the symposium provides a platform for education, networking, and meaningful dialogue on current trends, challenges, and innovations in arboriculture.

With targeted sessions for both leadership and operational teams, the event fosters knowledge sharing, professional growth, and industry collaboration. Whether you’re shaping the future of your company or advancing your personal expertise, the Fall Symposium offers valuable insights and connections for all levels of the profession.

The ISAO Annual Conference & Trade Show takes place every February, bringing together arborists and industry professionals for three days of learning, networking, and exploring the latest in tree care. Hosted by ISA Ontario, this event features expert speakers, workshops, and a trade show. For current details and registration, visit the ISAO website.

WAO TreeFest is an annual event organized by the Women in Arboriculture Ontario (WAO) Committee of ISA Ontario. Held each June, TreeFest offers a supportive environment for arborists of all skill levels to engage in climbing activities, skill-building workshops, and networking opportunities. The event celebrates and promotes the contributions of women in arboriculture. For current details and registration, visit the ISA Ontario website

The Ontario Tree Climbing Championship (OTCC) is an annual event hosted by ISA Ontario each September, bringing together arborists from across the province to compete in a series of challenges that simulate real-world tree work. The event is open to the public and features a trade show, educational workshops, and opportunities for attendees to try tree climbing under professional supervision. For current details and registration, visit the ISA Ontario website.

The MLR Vertical Expo is an annual three-day event hosted by Maple Leaf Ropes each October at the Ancaster Fairgrounds in Ontario. It brings together professionals from arboriculture, rope access, and rescue industries for hands-on training, gear demonstrations, and networking. Each day focuses on a different theme—Rope Access, Rescue/Tactical, and Arborist Skills—offering attendees the opportunity to learn from experts and test the latest equipment. For current details and registration, visit the Maple Leaf Ropes website.