National Express Corporation (NEC) is the North American subsidiary of National Express Group, PLC, one of the premier transportation firms in the United Kingdom. NEC is made up of Durham School Services in the United States and Stock Transportation in Canada. Both Durham and Stock share a strong commitment to provide quality transportation, outstanding customer service, positive employee relations and the highest level of safety.National Express Corporation (NEC) is the North American subsidiary of National Express Group, PLC, one of the premier transportation firms in the United Kingdom. NEC is made up of Durham School Services in the United States and Stock Transportation in Canada. Both Durham and Stock share a strong commitment to provide quality transportation, outstanding customer service, positive employee relations and the highest level of safety imaginable. Together, Durham School Services and Stock Transportation operate more than 17,400 school buses and serve 376 school districts in 30 states and two provinces. NEC has corporate offices located in Warrenville, Illinois, which houses the administrative and support functions for the company. Our local customer service centers (CSCs) are supported by regional operations teams located throughout North America. As a national company, we have a wealth of resources available to our customers, and still maintain an unmatched level of local support.