Owners in the architecture, engineering, and construction industry are consciously shifting their procurement and project management practices in search of higher performance. Yet a concerted change management effort is required in order to ensure project teams are able to adopt new practices successfully. This study utilized an action research approach to empirically measure the extent to which the new project delivery practices were adopted by project teams across 48 construction projects. Four categories of change management factors were investigated to assess their influence on project team adoption of new practices, including factors related to project, personnel, organizational, and implementation characteristics. Statistical analysis revealed successful project team adoption of new practices to be primarily impacted by the level of the firm's leadership involvement in implementation followed by the extent of change-related training provided to project team members who were tasked with implementing the new practices.