 This study found that participants preferred online video as their primary training delivery method for eight clinical trial competences. Mentoring coaching was the least preferred. Statistically significant differences were observed in the training delivery methods by three content domains, participant safety considerations, medicines development and regulation, and clinical trials operations. These findings provide guidance for program development, ensuring that standardized educational training is aligned with the needs of adult learners and can help prepare CRCs for the workforce. This article was authored by H. Robert Kolb, Juan Cuong, and Linda S. Bejohorenstein.