Atlas Energy Systems is an energy technology company commercializing the direct heat-to-energy science of Thermionics. The technology is called a thermionic energy converter and it directly converts heat to electricity with no moving parts. The company developing solid-state energy converters for waste heat power production, concentrated solar, and advanced nuclear reactors. Atlas Energy Systems pursuing a patent-pending direct energy conversion system that uses high-grade heat to boil electrons from a material via thermionic emission. These boiled-off electrons are collected across a small gap, then used to generate electricity. They using modern materials, new simulation software, and advanced manufacturing techniques to bring a 50-year-old technology into the 21st century. Atlas Energy Systems was founded in 2013 and is headquartered in Romeoville, Illinois, USA.