Supplier Diversity

Supplier Diversity Certification

To assist you, we have listed a small portion of some of the certifying agencies available to you.  

  • Department of Small Local Business Development in D.C. Certified Business Enterprise (CBE)
  • Maryland Department of Transportation (MDOT) Certification – MBE/SBE/ DBE
  • Baltimore City Minority and Women’s Business Opportunity Office MBE/WBE
  • Capital Region Minority Supplier Development Council (CRMSDC)

Technical Support – SMART by GEP Online Sourcing Application
USA: (732) 307-8731


Accounts Payable Inquiries

​​​​8 am - 5 pm ET​, Monday through Friday
(312) 429-9303


Invoice Processing

​​If not enrolled in Electronic Invoicing (eInvoicing), Constellation’s preferred method of invoice submittal is by email​.


Technical Support - EDI & eInvoicing


Diverse Business Empowerment Group


General Inquiries

For category manager contact information, please see our Category Manager Contact Information.

For corporate and media contacts, please visit our Contact Us​ page.

To report an ethics concern, please visit the Constellation Ethics Help Line​.