Downstream Global Procurement Contacts

Jim Nelson
General Manager, Global Procurement - Downstream
Email: jmnelson@marathonoil.com

Tim Barth
Manager, Energy Supply
Email: tfbarth@marathonoil.com

Ray Frederick
Manager, Strategic Sourcing & Corporate Support
Email: rlfrederick@marathonoil.com

Truth Garrett
Manager, Supplier Diversity
Email: tagarrett@marathonoil.com

Jeff Green
Manager, Procurement Systems & Process Control Integration
Email: jbgreen@marathonoil.com 

Brad Koller
Manager, Global Procurement - Refining
Email: bhkoller@marathonoil.com 

Brad Wietholter
Manager, Global Procurement - Marketing & Transportation
Email: bdwietholter@marathonoil.com