Katun is sponsoring the Jack Duncan Consulting Inventory and Purchasing course to be held in Oklahoma City December 5 – 6. What People are Saying Josh R:   Jack Duncan is a massive reason why I was able to transition from  A Field Service Supervisor all the way to a VP of Service. His multi-decades of experience … Continue reading JDC’s Inventory and Purchasing Course – December 5 & 6, 2017 – Oklahoma City