Steinmetz made groundbreaking contributions to the understanding of hysteresis, which improved the efficiency of transformers and electric motors. As a chief engineer at General Electric (GE), he developed mathematical theories that enabled the widespread adoption of AC power, making modern electricity grids possible. Despite his small stature and hunchback due to a genetic disorder, he became a respected professor at Union College and mentored future engineers. His inventions and innovations played a crucial role in electrifying the United States, earning him the nickname "The Wizard of Schenectady." Steinmetz's legacy continues to influence electrical engineering and power systems today.