Does the ethnoracial composition of local labor markets influence informal regulation of employment opportunities? To address this question, we link Census data on racial composition with survey data on unsolicited job leads in the 23 largest U.S. metro areas. The aim is twofold: (1) to operationalize three distinct conceptualizations of ethnoracial composition (general diversity, co-ethnic presence, and particularistic representation), and (2) to examine the influence of each at two distinct levels of local labor markets (the metropolis as a whole and occupational segments within each respective metropolis). Logistic regression results reveal that the odds of receiving unsolicited job leads do not vary by metro-level composition, but they do increase significantly with shares of white workers in local occupational segments. These results suggest that racial preference and privilege scale up to influence how employment opportunities are socially regulated in and across local occupational fields.