Objective: This study examines the difference between college students with and without Attention Deficit/ Hyperactivity Disorder (ADHD) in regard to their work performance. Method: A series of ANOVAs analyzed group differences in symptoms experienced at work. The independent variable was group (i.e., ADHD, Controls). The dependent variables include items from Barkley's "Work Performance Rating Scale" (Barkley & Murphy, 1998), which assesses the degree to which symptoms of inattention, hyperactivity and impulsivity are evident on the job. For the group with ADHD, the relationship between symptom severity and indicators of work performance (e.g., number of times fired, overall rating of work performance) was also examined, using correlational analyses. Descriptive analyses were also used to examine which items were most frequently endorsed by the group with ADHD, as well as which areas of work were most affected by ADHD symptoms. Results: Results reveal that ADHD has a detrimental impact on the work performance of college students in multiple areas. Severity of symptoms was unrelated to number of times fired from a job and the overall indicator of work performance. Conclusion: College students with ADHD do exhibit more on-the-job difficulties than their non-ADHD peers, and thus may require extra support with their work-related endeavors.