Smart Manufacturing Leadership Act This bill requires the Department of Energy (DOE) to complete a national plan for smart manufacturing technology (certain advanced technologies in information, automation, monitoring, computation, sensing, modeling, and networking) development and deployment to improve the productivity and energy efficiency of the U.S. manufacturing sector. DOE must expand the scope of technologies covered by Industrial Assessment Centers to include smart manufacturing technologies and practices and to equip the centers' directors with the training and tools necessary to provide technical assistance in smart manufacturing technologies and practices. DOE must: (1) study how it can increase access to existing high-performance computing resources in the National Laboratories, and (2) facilitate access to the laboratories by small and medium manufacturers. DOE may make grants to states for supporting the implementation of smart manufacturing technologies. States must use those grants to: (1) provide access to shared supercomputing facilities to small and medium manufacturers, (2) fund research and development of transformational manufacturing processes and materials technology that advance smart manufacturing, and (3) provide tools and training to aid the adoption of energy management systems and implement smart manufacturing technologies in the manufacturers' facilities.