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Working Together


Working with Marathon Oil

Shared Values

Our Global Supply Chain organization obtains goods and services from outside vendors that align with our Code of Business Conduct, and demonstrate compliance with applicable safety, environmental and transportation laws and regulations.

Successful supplier candidates should:

  • Be financially viable
  • Be competitive and have “value added” technical, cost or service advantages
  • Be ethical, with high health, environment, safety and security standards
  • Understand Marathon Oil’s business
  • Follow ISO or others appropriate industry procedures and processes
  • Have timely and accurate electronic invoice submission processes

New Inquiries
Interested in working with Marathon Oil? Our Global Supply Chain team evaluates all potential suppliers.

Required Supplier Onboarding
New to Working With MRO?

Required Supplier Onboarding

All new Marathon Oil suppliers are required to complete the Supplier Training Registration Form and associated video:

Have questions? We have the answers.
Supplier Hotline

Have questions? We have the answers.

Please direct questions regarding your registration or invoice status to the Marathon Oil Supplier Hotline:

Phone: 866-323-1836

From the U.K., dial: 808-234-2552 (BT) or 800-068-9831 (MCL)