The 2019 Summer Simulation Conference (SummerSim’19), a premier international conference of SCS, is an annual conference sponsored by The Society for Modeling and Simulation International (SCS), which focuses on modeling and simulation, tools, theory, methodologies and applications and provides a forum for the latest R&D results in academia and industry. It is a combination of the 51st Summer Computer Simulation (SCSC) and the 22nd International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS).