Latest Updates

Supplier Code of Conduct

Constellation values its relationships with its contractors, consultants, suppliers, and vendors, collectively referred to as "Suppliers”. We rely on Suppliers to help us deliver reliable, clean energy and innovative solutions while exercising the highest standards in safety, conduct, quality, and excellence.

Constellation updated the Supplier Code of Conduct, which remains a critical step in strengthening the way we work with our suppliers. This update isn’t just about streamlining a document—it’s about enabling Constellation and our suppliers to work side by side with greater transparency and alignment. Clear expectations lead to stronger trust, faster execution, and more resilient relationships across our entire supply chain.

The updated version is more concise, written in clear bullet points, and designed for action. By simplifying the language, we make it easier for suppliers at every level to understand our expectations, embrace our values, and put them into practice. The Supplier Code of Conduct continues to outline Constellation's expectations and standards for ethical conduct, with which all Suppliers, their subcontractors, and their respective workforces must comply when working for or on behalf of Constellation.

 

Supplier Actions

Additional Resources, including Training & Reference Guides, can be found on our Current Suppliers page.

 

Constellation System Updates

The supplier portal offers a user-friendly interface where suppliers can easily submit their invoices, track payment status, and access important information. This centralized platform ensures faster processing times, reduces errors, and enhances communication.  Additionally, the supplier portal provides real-time visibility into invoice status, allowing suppliers to have greater control and transparency over their invoicing process. It also enables suppliers to electronically submit and manage their invoices.

We believe that by embracing Oracle and utilizing the supplier portal, our suppliers will experience improved efficiency in their interactions with our company. We look forward to strengthening our relationship with our valued suppliers and achieving mutual success through these enhanced financial systems updates.

Supplier Quick Links

Vendors and Suppliers Affiliated With, or Referred, Recommended, or Requested by Public Officials Policy
The policy addressing vendors and public officials is located in the Ethics & Governance section of Constellation's website.

Accounts Payable Invoicing Guidelines
AP Invoicing Guidelines

Accounts Payable Inquiries
​​​​​​​​8 am - 5 pm ET​, Monday through Friday
invoiceinquiryteam@constellation.com
667-218-7667

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.

REGISTER FOR OUR PROCUREMENT PORTAL

Create your profile now to view your purchase orders and invoices and also manage your companies information.

REGISTER AS A PAYMENT-ONLY SUPPLIER

Register here as a 'Payment-only' vendor who is not providing contracted Services or Materials.

GEP SMART SOURCING APPLICATION

Create your sourcing profile here. It's a simple, quick, no-cost process. We're glad you're interested in doing business with Constellation.