Blog Contributors

Rick Kossik

Rick Kossik is the President and co-founder of the GoldSim Technology Group. He has a wide variety of experience in the fields of probabilistic risk analysis, simulation and decision analysis, and has spent most of his career developing and applying probabilistic simulation techniques to complex systems. He is one of the original co-developers of GoldSim, and has applied the software to evaluate complex engineering and business applications worldwide, including the evaluation and design of options to support the closure of hazardous waste disposal facilities, evaluation of management alternatives at mine sites, and long-term strategic planning for large manufacturing companies. He has also delivered over a hundred workshops and seminars describing simulation techniques and the use of the GoldSim software tool in North America, Europe, Australia and Asia. 

Prior to co-founding GoldSim Technology Group in 2004, Rick was a Principal with Golder Associates, a large international engineering consulting firm. In addition to serving as a senior staff member, he served on the Board of Directors of Golder’s US company for 3 years. Rick received his BS in Atmospheric and Oceanic Science from the University of Michigan in 1984 and his MS in Civil Engineering (focusing on water resources and hydrodynamics) from MIT in 1986.

Stefan Knopf

Stefan Knopf is the Chief Programmer and co-founder of the GoldSim Technology Group. He is an experienced software architect and application developer with experience in a wide variety of programming technologies, languages and application platforms. He is one of the original co-developers of GoldSim, and has been involved in the design and implementation of all major GoldSim features since the first release. Stefan is a seasoned software engineer with a passion for object-oriented programming languages, especially native languages such as C++. Much of his time is spent working on software architecture, data structures and algorithms, and user interface design.

Prior to co-founding GoldSim Technology Group in 2004, Stefan spent 10 years working as a software engineer with Golder Associates, a large international engineering consulting firm located in the USA, and Wismut GmbH, a federal government-owned company operating in Germany.  During these years he was responsible for the design and development of software solutions for dynamic simulation of complex systems, data visualization and virtual reality systems. He received a Dipl.-Ing. (equivalent of MS) in Electrical Engineering and Information Technology from Technical University Chemnitz in 1994.

Jason Lillywhite

Jason Lillywhite is a water resources specialist at GoldSim Technology Group, and has been with the company for 7 years. Prior to working at GoldSim, Jason spent 10 years working for CH2M HILL as a water resources modeler, much of that time using GoldSim. He is experienced in water resources modeling applications including water supply and demand simulation and forecasting, reservoir operations, water rights allocation, pump station operations, pipe hydraulics, unsteady open channel flow modeling, dam break analysis, and other applications related to stormwater, rainfall runoff, pipe networks, and water reuse analysis. Jason received his BS in Civil and Environmental engineering from Brigham Young University in 2000 and his MS in Civil and Environmental engineering with a water resources focus from University of Utah in 2008.

Ryan Roper

Ryan Roper is a Simulation Engineer at GoldSim Technology Group who spends much of his time on testing and verification of the GoldSim software while also contributing to technical support and occasionally consulting projects. His involvement in quality assurance came into full swing during the development of GoldSim version 11.0, released in July 2013. Given the magnitude of changes and major new features in this version, this was like being thrown into the deep end of the pool soon after he arrived at GTG.

Ryan joined the company in 2011 after spending 8 years at the University of Washington, initially as a graduate student in the Bioengineering department and later as a research assistant in the same department. He received a BS in Mechanical Engineering and Neuroscience in 2002 and a MS in Mechanical Engineering in 2003 from Brigham Young University as well as a MS in Bioengineering from the University of Washington in 2009. At BYU, where he studied the thermal sciences, he used mathematical and numerical methods to model heat transfer in cardiac tissue. At the UW, as a research assistant, he worked on a computational modeling project that involved integrating a reaction kinetics module into a software system for modeling the behavior of biological cells in cancer and embryonic development.

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