This trial studies the impact of a public summer jobs program in reducing violence. The 2013 One Summer Plus (OSP) program in Chicago offers 6 weeks of part-time summer employment at Illinois’ minimum wage ($8.25/hour). Local community organizations place youth in for-profit, nonprofit and government jobs (for example, clerks at a grocery store, summer camp counselors, workers in a community garden, or office assistants for an alderman). Youth are assigned job mentors—adults who help them learn to be successful employees and to navigate barriers to employment—at a ratio of about 10 to 1. All youth in the treatment group are also offered social-emotional learning (SEL) programming based on cognitive behavioral therapy principles, aimed at teaching youth to understand and manage the aspects of their thoughts, emotions, and behavior that might interfere with employment. Control youth are excluded from the program but are free to pursue other employment opportunities of their own volition.