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Corporate Social Responsibility (CSR) refers to firm policies aimed at improving environmental performance, strengthening social impact, and enhancing governance practices. CSR-related assets have expanded rapidly in recent decades and now exceed $30 trillion globally. An understudied driver of CSR’s rise is that sustainability might have become a key factor for job seekers, turning it into a strategic tool for firms to attract and retain talent. To quantify this mechanism, I develop a labor market model in which workers’ utility depends on firms’ CSR decisions, and I take it to the data leveraging an exhaustive matched employer-employee dataset covering all firms in France and rich CSR metrics. Importantly, my framework accounts for unobserved worker and firm heterogeneity in productivity, addressing biases in simple wage comparisons. Preliminary reduced-form results show that an increase in one standard deviation in firm sustainability is associated with a 0.05 to 0.15 standard deviation decrease in hourly wages. The effect varies over time in both magnitude and precision, suggesting heterogeneous and evolving firm incentives to engage in CSR and motivating further analysis of the factors shaping corporate sustainability strategies.