About Global Arboriculture Society

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Global Arboriculture Society is a premier, science-driven registration body dedicated to advancing the highest standards in arboriculture, horticulture, and forestry. Founded in 2003, we serve as a specialized alternative to public-facing certification organizations, operating exclusively through partnerships with responsible organizations rather than individual applicants.

Our Mission

We empower private companies, government agencies, municipalities, utilities, nonprofits, and other forward-thinking entities to build elite teams of arborists, horticulture, and forestry professionals. Through rigorous, evidence-based training, comprehensive examinations, and stringent registration protocols, GAS ensures that only the most knowledgeable and competent professionals represent our partner organizations in the field.

The GAS Difference

While many industry bodies focus primarily on certifying experienced individual professionals, Global Arboriculture Society takes a fundamentally different approach. We partner directly with organizations to develop their personnel from any starting level — including those with little or no prior experience — into true experts in their craft. Our programs combine scientific education, practical application, and rigorous testing to produce professionals who meet uncompromising standards of excellence.

This organizational focus delivers superior outcomes: consistent high performance across teams, reduced liability, enhanced compliance, and the confidence that every registered professional has been trained and verified to the highest level.

What We Provide

• Comprehensive Training Programs: Science-based curriculum covering all aspects of modern arboriculture and horticulture.

• Rigorous Examinations: Thorough testing designed to validate deep technical knowledge and professional capability.

• Official Registration: Prestigious registration reserved exclusively for professionals who meet GAS standards.

• Verification Database: A secure, reliable system allowing clients, regulators, and the public to confirm the credentials of registered professionals.

For more than two decades, Global Arboriculture Society has maintained an unwavering commitment to quality and scientific integrity. We do not register individuals directly from the public. Registration is available only through organizational partnerships, ensuring a controlled, high-caliber standard that benefits both the organizations we serve and the communities they protect.

A Legacy of Excellence

Since 2003, we have helped numerous organizations elevate their arboriculture,horticulture, and forestry capabilities to levels that set new benchmarks in the industry. Our exclusive model protects the integrity of the profession while giving partner organizations a genuine competitive and operational advantage.

At Global Arboriculture Society, we do not simply register professionals — we forge them through knowledge, discipline, and scientific rigor.