The Individuals With Disabilities Education Act mandates the performance of functional assessment for students with severe behavior problems. A functional analysis can be one part of this process but its use has been minimal. This study evaluates whether a paraprofessional could (a) be trained to correctly perform 3 conditions of a functional analysis with a student with severe behavior problems, and (b) be trained to correctly implement a function-based intervention. Procedures included an interview and descriptive assessment; training on performing a functional analysis; a functional analysis; a second descriptive assessment; and a function-based intervention. The results indicate it is possible to train a paraprofessional to accurately perform 3 conditions of a functional analysis, and then correctly implement a function-based intervention. (Contains 3 figures and 5 tables.)