The recent immigrant experience is widespread and requires understanding. Immigrants often struggle to maintain a sense of self while adapting to new geographic, social-economic, and cultural environments. Most scholars highlight participation in organizational settings as a predictor of social capital among immigrants, and at least one aspect of this relationship is included in recent research (Hirshman, Kasinitz, & DeWind, 1999). Most studies, however, have focused on the role of individual membership and participation in ethnic institutions. Little attention has been paid to the cultural patterns that shape social relations in immigrant environments and their impact on the health and well-being of immigrants. This paper examines cultural patterns established within immigrant service organizations in New York City, and the role of these organizations in the transformation of immigrant culture into social and health resources. In addition, the paper explores how cultural capital contributes to the sustainability of immigrant organizations over time. This research was carried out at selected organizations in New York City. Site selection was based on a typology of organizations previously identified in the literature (Cordero-Guzman, 2003; Foner, 2002) as forming the immigrant social service delivery system: informal neighborhood-based immigrant groups, clubs and associations; legally constituted community-based organizations (501(c)3 status); and large metropolitan-level providers that serve immigrants. A multi-method strategy was used to develop organizational profiles based on the socio-cultural resources and practices at each site. Preliminary findings suggest that these environments form unique fields of action for immigrants in New York City. Ethno-centered environments often have leaders who represent their constituents’ values and traditions, are somewhat embedded in their communities, reveal high levels of informational support, and strive to maintain a positive image. Community-based nonprofit organizations combine ethnic values with mainstream practices and beliefs, have leaders who often represent working to middle-class aspirations from both native and American cultures, offer multiple channels for community participation, and promote a variety of social support practices. These organizations, however, seem to be strapped for funding which might affect their sustainability over time. Citywide providers represent the most mainstream cultural values of the three studied environments, with leaders revealing a multitude of characteristics and practices reflected in the host culture. Mechanisms for community participation are often issue specific (e.g., HIV, sexual orientation), since these organizations are not necessarily embedded in the local communities, and social support is service-oriented. The policy and programmatic implications of these research findings are discussed as they relate to the social and cultural dimensions of immigrants’ health and well-being. Cultural aspects of immigrant service organizations that mediate the negative effects of differentiation and exclusion inherent in mainstream societies will be explored in their implications for immigrants’ social integration and development.