For a number of years we have known the positive impact on human performance and the retention of knowledge, skills, and ability from training conducted in a practical event-based immersive simulator. This paper demonstrates an innovative approach, without a simulator, that is designed to achieve similar levels of learning outcomes. Technical learning and Crew Resource Management (CRM) are analytically mixed to drive participation and engagement to achieve similar target levels of higher learning retention and on-the-job performance enhancements. This paper proceeds from the collaboration efforts between Baker Hughes, a GE company and Maersk Training. The result was a classroom-based course for newly appointed wellsite leaders responsible for managing and overseeing barrier management activities to prevent or mitigate process safety risks associated with loss of primary containment or loss of well control. Wellsite leaders are entrusted to ensure that critical operations and dynamic changes between services such as mud engineering, cementing, wireline, wellbore intervention, completion, and drilling operation do not result in a catastrophic safety or environment consequence. The leaders in these roles must possess technical knowledge on risk assessments and barrier management and extensive skill in CRM to maintain effective oversight and surveillance of the operations while engaging with multidisciplinary personnel and vendors delivering complex products and services at the wellsite. The paper elaborates on the training module design and the delivery of those modules in a dynamic switching mode. This delivery consistently maintained the linkages and interconnections between CRM, process safety, and barrier management and resulted in an effective event-based training outcome comparable to simulators.