Mid-Atlantic Chapter

The MAC-ISA is a non-profit professional organization of arborists, urban foresters, and others involved in the caring of trees.  Our membership is made up of people from commercial, utility municipal sectors, educational institutions and other green industry related fields.  Our mission is to foster research and education that promotes the care and benefits of trees.  Our chapter area includes District of Columbia, Maryland, Virginia and West Virginia.

Important News and Events 

• The Tree Risk Assessment Course and Exam scheduled for June 14 & 15 is now full.  Call 703-753-0499 or This e-mail address is being protected from spambots. You need JavaScript enabled to view it to be put on a waiting list for the next scheduled course. 

• 2010 MAC-ISA Tree Climbing Championship registration has begun.

• Check out MAC-ISA's legislative blog.

• ISA is searching for the 2010 "True Professionals of Arboriculture" 

  • Nominate MAC-ISA members  

  • FAQ flyer 

  • Chapter Participation Information