Gentlemens Tree Service is the premier tree service company serving Portland, Oregon and surrounding communities. Certified Arborist and Owner, Stephen Gibson will be onsite from start to finish of each project. At Gentlemens Tree Service we strive to preserve and improve our urban forest. As a result, we employ state of the art climbing and rigging techniques assuring that your trees and property are treated with care. Our pruning follows the American National Standards institute (ANSI-300) and the International Society of Arborculture (ISA) guidelines.