Manage Your Procurement Profile
Has your business changed? Do you offer new products or services that we should know about?
Current Supplier Resources
Tools to Help You Navigate Our Procurement Process
Constellation's suppliers are committed to the environment, safety and transparency. The right business partners help create positive results.
Constellation believes in seamless, transparent supply chain solutions. We welcome new suppliers that can help us meet our daily demands, future requirements and support our emergency response efforts with innovative solutions.
Manage Bidding Profile for GEP SMART
Has your business changed? Do you offer new products or services that we should know about?
Other Resources
These documents are intended for the sole use of Constellation and its suppliers. To open these files, you may need Adobe Reader.
Supplier Onboarding and Registration
Supplier Portal – Master Data
Supplier Portal – Transactions
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View the video below to learn how to use Maverick LIVE in app support.
Supplier Quick Links
Accounts Payable Inquiries
Accounts Payable Invoicing Guidelines
Contact By:
Email: invoiceinquiryteam@constellation.com
Phone: 667-218-7667
8 am - 5 pm ET, Monday through Friday
Invoice Processing
If not enrolled in Electronic Invoicing, Constellation's preferred method of invoice submittal is through our Oracle Supplier Portal Contact SupplierMgmtTeam@constellation.com to get access.
Technical Support - EDI & eInvoicing
electronicinvoiceteam@constellation.com
Supplier Development and Engagement
ConstellationSupplier@constellation.com
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.