ISNetworld® is a virtual company that manages the relationships between hiring clients and their contractors. Typically, contractors are asked to become certified through ISNetworld® by a hiring client before beginning a contract. This way, the client knows they are working with contractors that abide by standard safety regulations. An ISNetworld® rating is a letter grade issued to a contractor company based on the thoroughness and quality of its industrial compliance and safety standards. Contractors are considered ISNetworld® certified, or compliant, when they receive an A or B rating from ISNetworld®.