Maricopa County has implemented a new Advantage Enterprise Resource Planning System which, in part, includes procurement and financial system modules. Vendor have the ability to self-maintain their business information on-line. The system will go live on July 6, 2016.
Advantage Vendor Self Service
If you are trying to register as a vendor with Maricopa County and your business operates outside of the United States, please send an email to
with your name, business name, mailing address and telephone number where you can be reached.