A practicing arborist (arborist, arborist practitioner) is directly involved in the care and treatment of trees in the landscape; implements the recommendations of a consulting arborist; does the actual tree work. Click here for help in finding an ISA Certified Arborist in your local.
A consulting arborist is involved in the independent and objective application of technical knowledge, analytical skills and professional judgment to tree-related issues in order to provide observations, conclusions and appropriate recommendations.
LandArbor Consulting provides arboricultural consulting – we are not practicing arborists.
A more detailed explanation of arboricultural industry positions can be found at http://www.asca-consultants.org/?page=TypesofArborists