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S. de Raucourt is a key figure in planetary seismology, best known for their instrumental contributions to the InSight mission’s SEIS (Seismic Experiment for Internal Structure) instrument. Their research centers on the design, development, and deployment of ultra-sensitive seismometers for extraterrestrial environments, with a primary focus on understanding the internal structure of Mars. de Raucourt’s most impactful work is the landmark 2019 paper “SEIS: Insight’s Seismic Experiment for Internal Structure of Mars,” which has garnered over 375 citations. This publication details the deployment of a six-axes seismometer equipped with a Very Broad Band (VBB) instrument, marking the first successful seismic station on Mars since the Viking landers 42 years earlier. Their technical expertise was critical in overcoming the challenges of building a seismometer sensitive enough to detect marsquakes while surviving the harsh Martian environment. By enabling the first direct measurements of Mars’ crust, mantle, and core, de Raucourt’s work has revolutionized our understanding of terrestrial planet formation and interior dynamics, cementing their legacy as a pioneer in planetary geophysics.