Differences between firms explain an increasing amount of the growing wage inequality in the United States: it is not simply your occupation or industry, but your work at a specific firm that determines economic outcomes. I study whether women and minorities are disproportionately funneled into lower-wage firms. My research aims to understand whether there is a significant “glass-wall” between firms. If where you work is increasingly determined by gender or race, the consequences could go well beyond the economic. Human encounters occur at workplaces, and increasingly segregated firms can reinforce an increasingly siloed nation. I hope that my research would also help firms understand how common hiring practices and promotion decisions can inadvertently contribute to discriminatory outcomes – which may result in less productive and less diverse workforces.