We assessed and reduced the tardiness of 4 direct-care staff employed at a school that provides educational services to children with autism. The Performance Diagnostic Checklist - Human Services was administered to participants and their supervisors to identify one or more indicated interventions. Relative to baseline, tardiness was lower during intervention. The most effective intervention included task clarification, a problem-solving discussion, tokens exchangeable for back-up reinforcers, and weekly graphic feedback. Moreover, participants reported that the intervention components, particularly praise and a token, had high acceptability.