THE INDUSTRY

Ontario Certified – Certified Arborists in Ontario

Certified Arborists in Ontario are highly trained professionals who have demonstrated extensive knowledge, practical skill, and a commitment to excellence in the care and management of trees. Their credentials reflect a combination of rigorous training, formal testing, and ongoing professional development in the field of arboriculture.

There are two primary certifications recognized in Ontario:

Ontario Certified Arborist (Trade Code 444A)

This provincial credential is issued by Ontario’s Ministry of Training, Colleges and Universities (MTCU) through the Arborist Apprenticeship Program. To become Ontario Certified, individuals must complete a combination of in-school training and practical on-the-job experience. The program culminates in the successful completion of the Certificate of Qualification (C of Q), officially recognizing the arborist as a Journeyperson in Ontario.

ISA Certified Arborist

Awarded by the International Society of Arboriculture (ISA), this certification is internationally recognized and requires candidates to meet eligibility requirements—typically a minimum of three years of full-time experience in arboriculture or a combination of education and experience. Candidates must also pass a comprehensive exam that covers a wide range of topics, including:

  • Tree biology

  • Tree identification and selection

  • Installation and establishment

  • Pruning and maintenance

  • Soil management and fertilization

  • Diagnosis and treatment of pests and diseases

  • Tree risk assessment

  • Safe work practices

  • Urban forestry and tree protection

  • Tree preservation during construction

ISA Certified Arborists must adhere to a strict Code of Ethics and maintain their certification through ongoing education. Many Certified Arborists in Ontario are also members of ISA Ontario, the regional chapter that supports education, certification, and public outreach.

Why Hire a Certified Arborist?

Whether Ontario Certified, ISA Certified, or both, certified arborists are trusted tree care professionals who bring more than just technical know-how to the job. They understand complex tree systems, local bylaws, industry safety standards, and the latest research-based best practices.

Hiring a Certified Arborist means choosing someone committed to professional ethics, scientific integrity, and the long-term health of your trees and green spaces. Their recommendations are grounded in evidence, their work reflects a passion for arboriculture, and their presence adds value to both residential and commercial landscapes.

Our Tools & Equipment

Because arboriculture involves a wide range of tasks, our tools and equipment are as diverse as the work we perform. Depending on the scope and location of the job, our crews may utilize a combination of manual tools and heavy equipment. This can include cranes, bucket trucks, skid steers with grapples, and high-capacity chippers for efficient debris removal.

When access is limited or preservation is a priority, our team may rely on skilled climbers using modern climbing harnesses, rigging systems, and other specialized tools designed for arboricultural work. We also deploy high-pressure spray systems for tree care treatments when necessary. All of our equipment is carefully selected, highly specialized, and maintained to the highest standards to ensure safety and effectiveness.

Plant Health Care (PHC)

A properly designed Plant Health Care program is a critical component of tree preservation and should be based on careful, informed observation by a qualified professional. When recommended by a certified arborist, PHC strategies are tailored to address specific issues—such as insect infestations, nutrient deficiencies, or disease—before they become severe.

Unfortunately, PHC can sometimes be misused as a sales tactic. That is why it is essential to work with a trained and ethical Plant Health Care Technician who can accurately diagnose issues and recommend appropriate, evidence-based treatments. These professionals play a key role in extending the life and vitality of trees across Ontario and are deserving of respect for their ongoing commitment to environmental stewardship.

Bylaws & Municipal Regulations

Navigating municipal tree bylaws is an essential part of professional arboriculture in Ontario. These regulations exist to protect trees and the urban forest and should always be adhered to by both contractors and property owners. Compliance not only demonstrates professionalism and ethical conduct but also helps to foster trust between the public, municipalities, and our industry.

To assist our clients, we provide links to relevant municipal tree bylaws on our Resources page. We encourage all customers to familiarize themselves with local regulations before beginning any tree work.

Safety & Accountability

Arboriculture is a high-risk profession, and safety must be a top priority in every decision we make. Certified Arborists are trained to identify hazards, implement safe work practices, and ensure that both team members and the public are protected.

Accountability is central to our approach—each tree we care for and each site we step onto involves decisions that affect not only property, but people: someone's family member, friend, or neighbour. By leading with accountability, we inherently prioritize safety and uphold the integrity of our profession.