Working with marathon oil
contractors and suppliers


We require contractors to comply with our health, environment and safety (HES) policies, standards and guidelines, and monitor their HES performance on the job. Together, Marathon Oil and our contractors strive for excellence.

Marathon Oil's HES vision is aligned with our values, including those relating to corporate governance, ethics and integrity, diversity and philanthropy. Business decisions affecting HES are guided by our Code of Business Conduct. This HES vision is applicable to Marathon Oil Corporation and all majority-owned subsidiaries. Meeting this commitment is a responsibility shared by everyone, including all employees, contractors and third parties. To realize this vision, we pursue continuous HES improvement using our Responsible Operations Management System (ROMS) to assess risks, set targets, and measure progress.



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


Policies and processes
Contractor login

Marathon Oil requires contractors to comply with its Health, Environment and Safety (HES) policies, standards and guidelines, and monitors their HES performance on the job. Together, Marathon Oil and its contractors strive for excellence in health, safety and environmental performance. 


Our values

Our people and workplaces are safe
We’re committed to providing safe and healthy workplaces where our employees, contractors and others involved with our operations can work in a secure setting, free of injury or illness.

Our operations are clean
We conduct operations in a manner designed to protect the environment and will work to minimize wastes, emissions and other releases in all of our activities.

We practice responsible action wherever we work
We strive to be a good corporate citizen wherever we operate, in accordance with our corporate social responsibility position statement. We maintain high ethical standards, support sustainable business practices, and prepare for and respond accordingly to emergencies that may occur.

Safety Data Sheets cover health and safety aspects of products


Marathon Oil Statement of HES Beliefs


Marathon Oil Life Critical Expectations


In North America, Marathon Oil uses ISNetworld to manage, evaluate and qualify contractors to perform "Safety Sensitive Work."