Reiner Kruecken has been appointed as the Associate Laboratory Director (ALD) for the Physical Sciences Area at Lawrence Berkeley National Laboratory (Berkeley Lab), effective July 1. This area includes four divisions focused on understanding fundamental physics from subatomic particles to the universe's structure. Kruecken succeeds Natalie Roe, who held the position since 2020. His extensive background includes serving as Division Director of the Nuclear Science Division at Berkeley Lab since 2022 and previously as Deputy Director at TRIUMF in Canada. His research interests include nuclear astrophysics, heavy-ion collisions, and the development of advanced detectors for nuclear experiments. Kruecken holds a doctorate from the University of Cologne and has been recognized as a fellow of the American Association for the Advancement of Science and the American Physical Society. His leadership is expected to enhance the lab's legacy of achievements in science and engineering.