Welcome to ATCO's Home on the World Wide Web. OUR PROMISE: Service. Value. Accountability. Need the efficiencies of temporary staffing? Supplemental staffing with industry-savvy professionals is a time and money-saving strategy. ATCO Delivers. Prescreened, highly qualified experts for multiple disciplines within the telephone industry in addition to experienced project management, crisp execution of technical jobs and proven responsiveness and reliability. BICSI Certified RCDD on staff.