Joao C Waerenborgh graduated in Chemical Engineering from Instituto Superior Técnico (IST) Universidade de Lisboa in 1979 and completed his PhD in Chemistry at IST in 1993. He has been a principal researcher at IST since March 2012. His main scientific area of research is Solid State Chemistry and Physics, and his present research interests are magnetic properties and Fe electronic state in multifunctional molecular magnets and intermetallics; mineralogic characterization of natural samples; Fe speciation in soils and mine tailings; and Mössbauer spectroscopy of soils, oxides, sulfides, and nanomaterials. Joao C Waerenborgh was responsible for the Mössbauer Spectroscopy Infrastructure of IST until 2022 and was an elected member of the International Board on the Applications of the Mössbauer Effect (IBAME) from 2017 to 2022. He retired in 2023 and presently has a collaboration agreement with IST.