Karl Mueller is the Director of Ames National Laboratory and a leading authority in solid‑state NMR spectroscopy, quantum materials, and chemical imaging. He earned his B.S. in Chemistry from the University of Kansas and his Ph.D. in Physical Chemistry from the University of California, Berkeley. Before joining Ames National Laboratory, Mueller held senior scientific and leadership roles at Pacific Northwest National Laboratory, including Chief Scientist for the Physical Sciences Division. A longtime contributor to the American Chemical Society, he has served on ACS journal editorial boards and published extensively in ACS journals across materials chemistry and spectroscopy. A Fellow of the American Physical Society, Mueller has advanced NMR methods for probing structure and dynamics in complex materials, shaping next‑generation approaches to understanding and designing quantum and energy‑relevant systems.