ESTEEM aims to: a) review and identify the barriers and facilitators that may be effective in training particular groups of vulnerable workers, i.e. low-skilled & migrant workers in construction; b) develop and test a Safety Training Programme, an innovative training model for the development and delivery of safety training among these groups of workers; c) develop and test a Safety Training Evaluation Device that captures training transfer, i.e. that safety skills learned are transferred into daily work activities and thus results in improved safety climate and behaviours.