J. González began his scientific career in 1992 at the Complutense University of Madrid, where he studied cyclodextrin inclusion complexes. He earned his PhD at the Carlos III University of Madrid (UC3M), specializing in glass fiber-reinforced polymers. He completed research stays at several institutions, including Tampere University, Case Western Reserve University (CWRU), UC Santa Barbara (UCSB), and NIST, focusing on polymer science and materials characterization. He currently leads the AFM Laboratory at UC3M. In 2006, he founded the Polymeric Composite Materials and Interfaces research group (an official UC3M group), dedicated to the development of multifunctional thermoplastic materials. He pioneered a high-energy ball milling method to achieve uniform nanoparticle dispersion, enabling the design of materials with unique electrical and antibacterial properties. He has extensive experience in advanced nanoscale characterization techniques and has established close collaborations with internationally recognized groups, including the University of Salerno, University of Aveiro, UCSB, CWRU, Universidade Nova de Lisboa, Budapest University of Technology and Economics, the University of the Basque Country, and the University of Navarra, among others. His current research focuses on developing polymer nanofibers via Solution Blow Spinning (SBS) for medical, electrical, and food packaging applications. He has published more than 125 SCI articles, led international, national, and regional research projects, and serves on several editorial boards in the field of polymer science.