Arboriculture International LLC is a Portland, Oregon based company that provides arboricultural services to private property owners, tree care companies, commercial developers and municipalities throughout the nation and abroad. The common factor that ties all of these services together is the focus on preserving our oldest, largest, prominent trees in the urban landscape. Recognizing the importance of these trees is key to our forests productivity and essential to our health. Forests are at the forefront of environmental change.