Heritage Marathon Oil Retirees

RSVP to attend the virtual Benefits Transition meeting on Sept. 25 at 10 a.m. CT

Heritage Marathon Oil retirees are invited to join the Benefits team for a virtual presentation to learn about your new retiree benefits, 2026 Annual Benefits Enrollment and answer questions to help you make your benefits choices. Register to attend by clicking here. 

As you prepare for the transition into ConocoPhillips benefits, resources are available to support you.

Access Marathon Oil benefits resources

  • Get information about your current benefits by viewing the MRO Benefits website. You can also log in to the Marathon Oil Benefits Enrollment Portal, www.netbenefits.com/marathonoil, or call the Marathon Oil Benefits Service Center at 1-855-652-3067.
  • Contact the claims administrator for your coverage and/or claims questions.
  • For all other questions, contact ConocoPhillips HR Connections at 877-812-7547 or 918-661-5381 8 a.m. to 5 p.m. CST, Monday through Friday.

Learn about the ConocoPhillips retiree benefits and programs

  • Register to attend the Retiree Health & Welfare Benefits Transition Webinar meeting on Sept. 25 at 10 a.m.
  • Read about our retiree benefits offerings that will be available to you.

Links and Documents:
Request Marathon Oil SPDs