System Dynamics Modeling Workshop is the first of (hopefully) many workshops conducted by Systems Engineering, Modeling, and Simulation (SEMS) Laboratory. The workshop centered on the modeling of System Dynamics as a tool to create a representation of many complex matters in the real world. Throughout the workshop, the participants learned the concept of System Thinking, Stock and Flow Diagram, Conceptualization with Causal Loop Diagram, and System Dynamics modeling with PowerSim. The workshop lasted for 3 days from Moncay, August 2nd to Wednesday, August 4th. The workshop consist of 20 participants from 2007, 2008, and 2009 students of TI UI. Mr. Akhmad Hidayatno, Mr. Armand Omar, and Aziiz Sutrisno are the instructors of this interactive workshop.