This report discusses findings from the Transforming Industry-Led Assessment of On-Job Learning project. The project has been a collaboration between the New Zealand Council for Educational Research (NZCER) and the Building and Construction Industry Training Organisation (BCITO), funded by Ako Aotearoa. The project’s aim was to shed more light on systems of on-job assessment generally by focusing on one ITO specifically—the BCITO—and its improvements in organisational capability in order to improve outcomes for learners.