CentiMark Corporation, headquartered in Pittsburgh, PA, is North America’s largest roofing contractor with over 85 offices an ... d 3,500 employees across North America. Each office has dedicated crews, for the installation and service of all major roof systems, who are highly trained and experienced with a focus on safety. Our workplace is your roof, so the safety of your employees and our crews is a top priority which has allowed our safety program to exceed industry standards. Our mission is to keep our customer’s buildings watertight, protect their properties and employees, all in concert with regular business hours. read more