|Abstract||In this exploratory, mixed methods project, we seek to understand how implementation of Trust-Based Relational Intervention (TBRI), a trauma-informed, evidence-based model of caregiving developed by TCU faculty, has shaped systems of care for vulnerable children and youth. The current study reports on the first year of implementation across nine child welfare organizations participating in a county-wide mental health collaborative. Data included monthly implementation process interviews conducted with representative staff of each agency, as well as survey data from a subset of agencies [TCU Survey of Organizational Functioning (SOF); n = 4 agencies]. The data sample reveals overall increases for TBRI strategy use during the first year of implementation. In addition, organizational functioning scores that were above the baseline mean of the sample yielded increased scores in strategy use. Future research suggests further analyzing the complexities of TBRI implementation across the large-scale collaborative.