It is very important to make sure you hire a competent professional when searching for someone to care for your trees, or handle other urban forestry tasks. By hiring an ISA Certified Arborist you can rest assured that you have an experienced professional that is knowledgeable about proper tree care practices. Many companies may claim 'years of experience', however years of wrong tree care practices do not make the experience a valuable assets for the client. Additionally, when hiring an arborist make sure to check their credentials and ask for references if you are still uncertain about their abilities. A quality arborist will go over what needs to be done, why it should be done, and potentially a list of other options and outcomes. Hiring a the wrong people for the job can result in damaged trees and property, weakened trees, and more costs in the future to correct poor practices. Below is a video that goes over the basics of why to hire an arborist (in particular and ISA Certified Arborist). And as always, do not contract companies that advertise or say they will top your trees.