C. Dennis Pegden, PhD. is co-founder and Chief Executive Officer of Simio LLC. He was also the founder and CEO of Systems Modeling Corporation, later purchased by Rockwell Automation. He has held faculty positions at the University of Alabama in Huntsville and The Pennsylvania State University. He led in the development of the SLAM, SIMAN, Arena, and Simio simulation tools. He has co-authored three simulation textbooks and has published papers in a number of fields including scheduling and simulation. Dennis is widely recognized as a "Titan" of simulation and has been responsible for many simulation and scheduling innovations over the past 35 years.