Study data came from 2,407 individuals applying for the job of corrections officer in a large urban correctional department between 1980 and 1982 and from 905 candidates who were subsequently hired and stayed on the job for 1 year. The job application procedure included completing the Minnesota Multiphasic Personality Inventory (MMPI), a personal history questionnaire, and the Inwald Personality Inventory. Females revealed more emotional and/or behavioral difficulties than males on the preemployment instruments, either because of true differences or because of candor or naivete in making admissions on the tests. The males endorsed items indicating antisocial acting out behaviors which were later predictive of male failures and difficulties on the job. In actual job performance, females who were extroverted and assertive had more likelihood of being terminated than did less assertive females. Females were absent and late twice as often as males, but they were disciplined less often than males. The females' higher percentage of single-parent responsibilities may have partly explained their record. More managerial training in disciplinary procedures for all officers, together with supportive services such as child care facilities, is recommended, along with more departmental attention to officers' employment needs, job adjustment, and coping patterns. Data tables and 11 references.