The Colorado Department of Human Services' Division of Child Support Services (CSS) embarked on an innovative partnership with counties to transform child support services in Colorado from a traditional enforcement approach to a family-centered multigenerational approach, commonly known as the "two-generation" or "2Gen" approach. For CSS, the primary goal of the 2Gen approach is to support family income growth by providing both parents with access to employment services and the tools needed to build social capital and improve the long-term outcomes of children. Because packaged, replicable 2Gen models for child support services did not exist when this transformative work began, the State of Colorado developed an innovative model and initiated an 11-county pilot known as the 2Gen Child Support Services Transformation Project (the 2Gen Project). This report includes: Part I: Implementation findings and lessons learned during the first eight months of implementing the 2Gen Project in 11 Colorado counties; and Part II: The results of the impact study, an 11-county randomized controlled trial. The primary audiences for this report are state-and county-level child support services administrators and supervisors. Together, these studies may inform Colorado's long-term investment and approach to CSS reform.