The lecture explains the impact of international migration on social skills of two generations of Poles: the ‘Generation of Change’ (born in 1970s and the beginning of 1980s) and the ‘Generation of Migration’ (born in 1980s and at the beginning of 1990s) (Szewczyk 2015). We use data from extensive quantitative study on Human Capital in Poland (migrants=4040; stayers=67174) and qualitative studies on Peer-groups & migration (n IDI=160). International migration has the strongest impact on social skills of ‘Generation of Change’, particularly on those born 1968-1972 who were 18 in 1989, and were also called ‘Generation of Historical Hope and Everyday Risk’, and were treated as testimonials of system transition (Mach 2003). In general, the effects of migration on social skills persisted in birth cohorts born till 1989. The younger cohorts were, the more migration impacted on life skills. Therefore, the mobile transitions approach (Robertson et al. 2018) was needed to capture how younger cohorts, born after 1989, also from the ‘Generation of Migration’ formed, enhanced and consolidated various life skills through international migration. Especially for young post-accession migrants from Poland, working abroad went far beyond the impact on formal qualifications and just employability. It related to life skills of self-making, making biographical transitions, communicating and relating to people and understanding society. Next to acquisition and impact of migration on social skills we will also show transfer and their outcomes- what positions people achieve in the labour market after return (or while experiencing return mobilities, King 2017).