The purpose of this website is to provide a responsive, secure environment within which Navistar and the Supply Chain can partner in innovation to achieve world-class material, cost, quality, and delivery performance.



For Procurement’s Source to Contract Portal questions or information, email S2CHelp@Navistar.com.

For iSupplierPortal technical support issues, email suppliersupport@navistar.com

For Logistics questions or information, call 800-323-4338 for assistance from the XPO Logistics Center, or click here for a detailed contact list.

For Navistar Defense supplier information, see www.navistardefense.com/supplier

For Supplier Scorecard questions or information, email EnterpriseScorecard@navistar.com.

For Supplier Quality questions or information, email ISQ@navistar.com.  Learning modules are also available at www.navistarsuppliertraining.com

For Conflict Minerals questions or information, email Conflict.Minerals@navistar.com

For Electronic Payments Migration Initiative questions or information, click here

For IMDS questions or information, email IMDS.Submissions@navistar.com