Care for your trees needs to be done by skilled, trained and insured professionals, both for the health and beauty of your trees and for your safety. Not only tree workers but also homeowners are killed doing tree work every year. For your safety, do not perform tree work! For your protection, hire a company that is professional, licensed and insured. If the company doesn't have insurance or is not a license company - you, the Somersworth homeowner - could be held responsible as a contractor.