Buildings consume more than 40% of energy in the U.S. Effectively and efficiently managing and controlling building energy and mechanical systems for a sustainable built environment remains a critical challenge. Studies shows intelligent building controls enable a greater than 20% energy savings in specific buildings, accounting for 2% of national energy consumption. Even small improvements in control system logic can make significant changes in energy savings over the course of a year or longer. How to develop, test and evaluate controller performances is crucial for scalable deployment of these control logics including load controls and distributed control solutions.