Polymerization in dispersed media - mostly aqueous emulsion and suspension – is a major solvent-free technology accounting for 20% of the world polymer production. European leadership in this strategic market can only be maintained by training a creative, entrepreneurial and innovative next generation of researchers. Submitted to the H2020-MSCA-ITN-2017 call, the proposal entitled PHOTO-S-LATEX aims at improving the career prospect of 10 Early-Stage Researchers (ESRs) through an interdisciplinary research programme focused on 2 outcomes. 1. Fundamentals of scientific knowledge gained in the development of a breakthrough process: thiol-ene photopolymerization in dispersed media developed by the ETN coordinator. The new combination of step-growth radical polymerization and light mediation opens avenues for improved process conditions as regards polymer architecture control, particle functionalization, minimal residual monomer concentration, efficiency, safety, energy consumption, and compactness. Additionally, there is a wind of change on products, with the onset of new waterborne polysulfide coatings with high performance properties (high barrier films, self-healing) or biobased, biologically-active nanoparticles, powder aerosols and highly porous polymers. 2. Transferable and specialized skills learned through research-related activities, industrial secondments, and innovative training methods such as tandem ESRs, distance language learning, ESR as itinerant science educator, online courses, and ESR-led subproject. Such comprehensive set of competences are likely to make ESRs able to face the challenge of translating knowledge into marketable and sustainable products useful for society. PHOTO-S-LATEX aims at excellence in doctoral training through a synergistic high-quality research network including 8 internationally reputed academic institutions, 4 leading industries and 2 non-profit organisations. The consortium diversity expresses through the participation of 7 different European nationalities (Austria, Belgium, France, Germany, Poland, Slovenia and Spain), and 45% female (co)scientists-in-charge.