This is the second brief in a series, "Building a Post-Care Service System in Child Welfare: Lessons Learned from the Frontlines of Implementation Science in Catawba County." This brief describes how implementation science principles informed technical assistance strategies used in Catawba County to support the full and effective use of evidence-based and evidence-informed practices (EBPs/EIPs). Topics include building the capacity of local implementation teams, conducting stage-appropriate activities, and creating an implementation infrastructure to sustain new interventions. (Contains 2 figures and 3 footnotes.) [For related briefs, see "Building the Child Wellbeing Project: Practitioners' Perspectives on the Role of Implementation Science in Strengthening Post-Care Child Welfare Services. Research-to-Results Brief. Publication #2012-18" (ED534867) and "Implementing a Post-Care Service System in Child Welfare: The Catawba County Child Wellbeing Project. Research-to-Results Brief. Publication #2012-16" (ED534864).]