Isa Certified Tree Worker
The International Society of Arboriculture (ISA) is the worlds biggest group of professional arborists with over 20,000 members distributed throughout 38 “Chapters” across the 5 continents.
The ISA operates in the United Kingdom & Ireland via its UK & I Chapter. The Chapter formed in 1992 to represent the UK based professional arborist and to promote an international platform for the advancement of the science of arboriculture. Take a look at the United Kingdom & Ireland arm of the largest and most influential arboricultural organisation in the world.