Sara Lewis is currently a world-wide technical leader for the IBM ILOG Supply Chain Products. She has run many full-scale network design studies for companies around the world, she has conducted hundreds of training sessions for many different types of clients, leads a popular network design virtual users group, and helps create educational material for network design. She has been involved with this group since 2006 when the network design tool was owned and produced by LogicTools. Prior to LogicTools, she held various supply chain roles at DuPont. She holds a Bachelor’s degree in Business Logistics and Management Information Systems from Penn State University and is a fre- quent guest lecturer on the topic of network design at several U.S. universities.