This paper explains how social capital activates the accumulation of human capital within a Diaspora context. Our study focused on migrants in the Lithuanian Diaspora and revealed unexpected differences in the way low- and high-skilled migrants developed and applied social capital in order to accumulate human capital. Namely, despite a less privileged point of departure, low-skilled Lithuanians appeared stronger in developing new social networks, and were more driven to strengthen their human capital than high-skilled migrants. The study provides novel empirical and theoretical insights by explaining the significance of social capital in the accumulation of human capital among Diaspora communities. In so doing, the study provides important insights for integration policy development for immigrant-receiving countries, offering a different perspective on high- and low-skilled migrant mobility and integration intentions.