Social networks have long been identified as crucial to migration flows and the economic behaviour of immigrants. Much of the literature on international migration and economic sociology specifically focuses on the role of interpersonal ties in influencing migration and economic action, such as finding employment. Using the case of Gujarati Indian migration to New York and London, the life histories of these immigrants illustrate that specific configurations of network ties result in different migration flows and occupational outcomes. These configurations include organizational, composite, and interpersonal ties that link local labour markets transnationally and channel immigrants to particular destinations and into particular occupations. The findings clarify the role and meaning of networks as they affect different types of migration and the occupational outcomes of migrants. The prominence of these network mechanisms also challenges the role of human capital in producing distinct outcomes for immigrants.