Affiliations Tree Care Industry Association (TCIA) http://www.treecareindustry.org – TCIA develops safety and education programs, standards of tree care practice, and management information for arboriculture firms around the world. International Society of Arboriculture (ISA) http://www.isa-arbor.com/ - The International Society of Arboriculture (ISA) has served the tree care industry for over eighty years as a scientific and educational organization The Better Business Bureau, TCIA, ISA Member, Certified Arborists and Certified Personnel. Timber Operating License # A9545 California State Contractors License # 746323