Many organizations offer engineering, design, and project management services related to zero-emission transportation solutions.  These organizations include large companies such as Parsons Brinckerhoff, smaller firms such as Transit Resource Center, and non-profit organizations such as WestStart-CALSTART and the Northeast Advanced Vehicle Consortium (NAVC).

TransPower's Preferred Supplier Network includes many of the leading providers of engineering, design, and project management services related to zero-emission transportation solutions.  The services offered by these organizations complement those offered by TransPower, and in many cases TransPower can work collaboratively with such organizations to help implement zero-emission transportation solutions.