Become a Member
Your membership pays itself back through discounts on products, access to exclusive resources, and educational opportunities.Become a Member
Attend an Event
We promote safety in all that we do. MAC-ISA provides a huge array of educational events. Click below to view all the upcoming events.Register Online
Become Certified
Want to become a Certified Arborist or Tree Worker? Find out which of the ISA certification credentials best meet your needs.Become Certified
Who We Are
The MAC-ISA is a trade association for arborists, urban foresters, and others involved in the caring of trees. Our mission is "to promote a culture of safety while fostering education and research that supports the care and benefits of trees." The chapter area includes District of Columbia, Maryland, Virginia and West Virginia.
Upcoming Events
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2022 Day of Arboriculture
November 12, 2022
United States National Arboretum -
ISA Tree Risk Assessment Qualification (TRAQ 3 Day Course)Charlottesville, VA
November 30, 2022
Virginia Department of Forestry Headquarters -
2022 Arborist Certification Course (3 Day Course) Dec. 6-8, Gaithersburg, MD
December 06, 2022
Green Farm Maintenance Facility
News & Announcements
Annual Meeting
Registration is open for our Annual Meeting, October 2-4, 2022 at the Virginia Crossings Hotel & Conference Center in Richmond, VA. More information available here!
Industry Resources during the COVID-19 Crisis
Our events calendar will be kept updated if other cancellations or postponements are made. The MAC-ISA staff is working remotely with the full capabilities of supporting our members. Read more.
2022 Events
MAC-ISA has upcoming Arborist Certification Courses, Tree Risk Assessment Qualification and Renewal Courses, and more ahead of us this year. Click here for our upcoming events. Check out the Green Industry events that we have listed near the bottom of the page as well.
Registration Open for Many Events
Registration is available for our Certification courses and TRAQ courses and TRAQ renewal courses.
Updated Guides and Guidelines for the Mid Atlantic
We have an updated Species Rating Guide & Tree Appraisal Guidelines for the Mid Atlantic Region
Safety Tips
Helmet Safety
Always wear a helmet with your chin strap buckled.Risk Assessment
Perform a level 2 risk assessment before your climb.Climbing Safety
Always stay on rope.
Utility Lines
Assume that all utility lines are energized.Stay Alert
Stay alert at all times.Protect Crew & Public
Establish a clear work zone and drop zone.PPE Safety
Inspect and clean your PPE regularly.Emergency Response Plan
Establish an emergency response plan prior to work.Check Before Working
Check your equipment, surroundings and yourself prior to everyone's job. Maintain the 4 A's
Maintain the 4 A's: Attitude-Awareness-Action-AccountabilityCommand & Response
Use command and response.Report Unsafe Behavior
Do not accept unsafe behavior (if you see something, say something).Attend An Event
We promote safety in all that we do. MAC-ISA provides a huge array of educational events. Register for one of our events today!
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Annual Meeting Two-day event usually held in October.
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Tree Climbing Championship Chapter members showcase their climbing skills.
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Certification Courses Three-day course to become ISA Certified Arborists.
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Tree Risk Assessment (TRAQ) Consists of a 2-day educational course followed by a ½ day assessment
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Day of Safety To promote a culture of safety while fostering education.
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Tree Fund Events MAC-ISA partners with the Tree Fund.
