Dr. Mantas Šimėnas is being honored with the Young Investigator Award for 2023 for his outstanding and creative contributions to many areas of EPR. Dr. Šimėnas has advanced studies of inorganic materials research, with a particular emphasis on metal-organic frameworks, using continuous-wave and pulsed EPR methods, and pushed for the enhancement of EPR sensitivity using novel micro-resonators and cryo-amplifiers that enabled measurements of biological samples that were hitherto infeasible. Dr. Šimėnas also made significant contributions to the solid-state physics of ferroelectric materials by using paramagnetic ions as probes, which has attracted interest well beyond the EPR community and has provided substantial insight into the phase transitions of ferroelectric materials. Already as a young investigator, Dr. Šimėnas has made impactful contributions to the field of EPR spectroscopy and inorganic materials research. The International EPR (ESR) Society is proud to award the John-Weil Young Investigator Award to Dr. Mantas Šimėnas in recognition of his outstanding work and future potential in the field.