Doing Business with Us

(Versión Español)

Welcome to Occidental's supplier web pages, which provide orientation, support information and tools for prospective or registered suppliers. Occidental Oil and Gas Corporation and its subsidiaries, Occidental Midstream Strategic Development and Centurion Pipeline L.P. are referred to as "Occidental" or "Oxy" in these webpages.

Prospective Supplier

Occidental invites prospective suppliers to complete the prospective supplier registration. To learn more about our operations, please browse the Operations pages under Our Businesses. Please note that completing the prospective supplier registration does not imply a contract, or intent to purchase goods or services from prospective suppliers by Occidental.

Registered Suppliers

iSupplier Portal Access - To access the iSupplier Portal, click here.

The iSupplier Portal is an online self-service tool that allows you to directly access information and conduct transactions. In the future, Occidental may decide to exclusively to use suppliers that are registered on its iSupplier Portal.

Important: If your company is currently doing business with Occidental, but does not have access to the iSupplier Portal, please contact your Occidental representative.

Training Material


Visit this Presentation to see an overview of the iSupplier Portal functionality.

iSupplier Portal User Guides

Note: For step by step instructions on how to use the iSupplier Portal, click on the applicable link below:


Supplier Key Action

User Guides

Navigation General overview of the iSupplier Portal to access, reset passwords, navigate, define preferences and notifications. Overview to Access, Passwords, Navigation and Notifications
iSupplier Users Administration Create, update and inactivate iSupplier Portal Users; reset user passwords. Administrate Users-Security Administrator
Request for Information View, acknowledge and submit response to Request for Information (RFI). Respond to RFI
Request for Quotation View, acknowledge and submit quote for Request for Quotation (RFQ). Quote RFQ
Purchasing Document View Purchasing Documents (Purchase Orders, Service Orders, Contracts, Master Services Agreements, etc.); and their price; electronically accept a Purchasing Documents. View and/or Accept Purchasing Documents
Receipts and Returns View Receipts and Return View Receipts and Returns
Contractual Deliverables View and submit information and documentation required by Occidental, associated with a Purchasing Document.
View and/or Submit Contractual Deliverables
Invoices and Payments View Invoices and Payments.
Electronically submit invoices against Standard Purchase Orders.
Electronically submit credit memos.
Electronically view/submit Supplier Charges/Field Ticket Invoices against Agreements.
View Invoices and Payments
Submit Electronic Invoices

Submit Electronic Credit Memos
View and Submit Electronic Supplier Charges Invoices


Occidental organizes webinar online live training sessions for specific topics, such as e-Invoicing, creating/submitting supplier charges and creating SPO matched invoices.

  • Click here to download instructions on how to participate and connect to a webinar.

  • Click here to download a PowerPoint presentation associated with the webinar.


B2B iSupplier Portal Supplier Charges Integration

If your company is interested in implementing the B2B electronic exchange of the iSupplier Portal Supplier Charges, please review the Integrated Supplier Implementation Guide (PDF). Then complete and submit the Supplier B2B Integration Readiness and Technical Assessment Questionnaire and/or inquiries to

Registered Supplier Information Modification

Occidental considers it critical that suppliers keep all supplier data current. If there are any changes in your company information, such as: legal entity name, addresses, bank accounts, tax ID, legal structure, iSupplier Portal - Supplier Security Administrator, etc., please complete and submit the Registered Supplier Information Modification Form.

Frequently Asked Questions (FAQs)

For additional help regarding the iSupplier Portal, ADP® and other related topics, visit the Frequently Asked Questions.

Supplier Help Desk

Visit the Supplier Help Desk section to access the Inquiry Form and/or phone numbers and request additional help.