Designed for public and private sector emergency responders, CommandSim enables much-needed recurrent, realistic, and low-cost training and exercises for command and control, communication, strategy, tactics, and equipment usage. The software enables firefighters and other responders to conduct critical training exercises in a virtual environment, localized based on structures and buildings within their own jurisdiction. Instructors can dynamically evolve an incident, mirroring the stressful, ever-changing variables that occur during an emergency. Scenarios can be as simple as static images or highly sophisticated including realistic animations, victims, and interactive equipment. With CommandSim, thousands of responders across the United States are building skills that translate into documented performance improvements in the field. The result is that responders can train safely, effectively, and economically - helping them in protecting communities and saving lives.