Stephan Schlamminger earned his diploma in physics from the University of Regensburg,
Germany, in 1998, followed by a Ph.D. in experimental physics from the University of Zurich,
Switzerland, in 2002, where his thesis focused on determining the gravitational constant. From
2002 to 2010, he worked at the University of Washington, conducting experimental tests of the
equivalence principle.
In 2010, Stephan joined the National Institute of Standards and Technology (NIST), where his
research centered on the watt balance, a key tool in redefining the kilogram. He became the
group leader of NIST’s Fundamental Electrical Measurement Group in 2016. He also taught
physics at the Regensburg University of Applied Sciences from 2017 to 2018.
Since the Fall of 2018, Stephan has continued his work as a physicist at NIST, focusing on the
realization of the unit of mass and impedance measurements. Throughout his career, he has
achieved the rare feat of determining both the gravitational constant and Planck’s constant
twice.
