UHMob is a multi-site European Training Network (ETN) aimed at enabling multidisciplinary and cross-sectoral training and research on a hot topic at the interface between Materials Chemistry, Nanoscience, Spectroscopy, Crystallography, Physics, and Optoelectronics. The mission of UHMob is to widen the career perspectives of Early-Stage Researchers (ESRs), in academic and industrial sectors, in the economical, environmental, and societal important field of organic electronics. With the goal to train 15 ESRs, 6 universities, 2 research centres, and 2 companies in Europe will join their forces. The University of Kyoto, that has a unique expertise, will complement the consortium and will further increase the international dimension of the UHMob. The intensive training program, that largely takes advantage of secondments, is supported by recent scientific breakthroughs of UHMob partners to offer to ESRs the opportunity to carry research at the forefront of Science. Specifically, the scientific objective of UHMob is to gain a fundamental understanding of charge transport mechanisms in molecular semiconductors. To this goal, best-performing and well-characterized materials will be studied by a complementary set of methods, including evidently field effect transistors but also optical methods such as terahertz spectroscopy, field-induced time resolved microwave conductivity. UHMob will also explore the coupling of molecular semiconductors with the vacuum electromagnetic field, that is a radically new physical concept which holds great promises to modulate optoelectronic properties of materials.