Arborist is a liberal profession, so it often happens that a tree is treated improperly.
To prevent this, the European Arboricultural Council has set up the European Tree Worker certificate. A European Tree Worker is a professional arborist. He has knowledge of pruning and maintaining trees, knows many different tree species, can fell trees safely and efficiently, knows how to plant and transplant optimally, is familiar with many laws and regulations regarding trees and many other aspects concerning trees . Nino van de Rijzen has a European Tree Worker certificate, and many employees do, which is internationally recognized as a quality mark in tree care.