Thank you for your interest in our white paper: “Active Invoice Review: The New Frontier for Contractor Billing Validation”

Brian Barr, CPA is a former Senior Manager in Supply Chain and Business Planning & Analysis at Marathon Petroleum (formerly Andeavor) who developed, deployed, and managed a contractor billing validation program for both Track and non-Track spend from 2012 through 2018. Brian has a Lean Six Sigma Green Belt and is the author of a White Paper entitled, “How Contractor Billing Validation Strategies Enhance Project Management” and “Active Invoice Review: The New Frontier of Contractor Billing Validation”.

We hope you enjoy this white paper and better understand how CPRS can help you.


For more information, please contact or call us at 866.488.9677.