Michael Lefenfeld is a powerful thinker. You can see it in his eyes and the expression on his face. And he has a knack for turning a creative idea into reality. One of Lefenfeld’s best ideas so far is figuring out a way to make user-friendly alkali metals for large-scale chemical reactions. His discovery led to the formation of New York City-based SiGNa Chemistry, for which he now serves as president and chief executive officer.