We describe the structure for implementation of the wraparound process within a multi-tiered system of school wide positive behavior support (SWPBS) to address the needs of the 1-5% of students with complex emotional/behavioral challenges. The installation of prerequisite system features that, based on a 3 year demonstration process, we consider critical to full operation of the Tier 3 wraparound intervention within a system of SWPBS is also described. We include examples of system implementation benchmarks that occur concurrently with student outcome data and are logically linked to full operation and sustainability of wraparound implementation. Challenges surrounding implementation and proposed advancements are also discussed. (Contains 2 figures.)