Autocrats depend on a capable secret police. Anecdotal evidence, however, often characterizes agents as surprisingly mediocre in skill and intellect. To explain this puzzle, this article focuses on the career incentives underachieving individuals face in the regular security apparatus. Low-performing officials in hierarchical organizations have little chance of being promoted or filling lucrative positions. To salvage their careers, these officials are willing to undertake burdensome secret police work. Using data on all 4,287 officers who served in autocratic Argentina (1975-83), we study biographic differences between secret police agents and the entire recruitment pool. We find that low-achieving officers were stuck within the regime hierarchy, threatened with discharge, and thus more likely to join the secret police for future benefits. The study demonstrates how state bureaucracies breed mundane career concerns that produce willing enforcers and cement violent regimes. This has implications for the understanding of autocratic consolidation and democratic breakdown. Replication Materials: The data and materials required to verify the computational reproducibility of the results, procedures and analyses in this article are available on the American Journal of Political Science Dataverse within the Harvard Dataverse Network, at: https://doi.org/10.7910/DVN/PGFOXW. "We don't want clever people. We want mediocrities."-Officer, Greek Military Police 1 A utocracies are notorious for their systematic violation of civil liberties and human rights (e.g., Davenport 2007; Frantz and Kendall-Taylor 2014; Valentino 2004). At the core of autocratic repression stand secret police forces (Arendt 2017; Friedrich and Brzezinski 1965). For centuries, regimes have made extensive use of and largely depended on the loyalty of such organizations (Baldwin 1934; Greitens 2016; Plate and Darvi 1982). Charged with the responsibility to protect the regime from internal and external threats, secret