Implementing evidence-based practices in real-world settings poses significant challenges. Organizations involved must address this issue by providing supportive infrastructures. Among the elements to consider are competency drivers, which refer to the selection, training, and supervision of caseworkers. The purpose of this study was to describe the perspectives of caseworkers and representatives on competency drivers that organi-zations put in place to support the implementation of early intensive behavioral intervention (EIBI) in large-scale community-based services. The sample consisted of 109 caseworkers and 23 organization representatives who completed questionnaires. Results demonstrated that respondents consider clinical support and training as key elements in EIBI implementation. However, despite recognizing these factors, respondents reported considerable variability in practices. It appears necessary to better define and plan the implementation of these competency drivers with a view to improving EIBI implementation.