This paper develops measures of the occupational homogeneity of employers as indicators of outsourcing. Findings are threefold. First, workers in low-wage occupations saw their employing establishments become more occupationally homogeneous during 2002-2016. Second, wages are strongly related to occupational homogeneity, particularly for workers in low-wage occupations. Third, changes in the occupational homogeneity of workplaces are an important contributor to growing wage inequality among workers in the lower 98.5% of the wage distribution over this period. The growing separation of workers in low-wage occupations into different employers from workers in high-wage occupations is an important part of wage inequality growth.