Research provides ample evidence that positive social relations and access to knowledge are supportive for educational change. However, few studies have examined how personnel turnover and restructuring in school districts influence these processes, specifically as they relate to leaders' access to research evidence and perception of organizational learning and culture. In this longitudinal exploratory mixed-methods case study, we examine the changes in social networks and organizational learning among school and district leaders during a 3-year district restructuring process. Our study uses social network analysis, bivariate analyses, and qualitative coding. We surveyed district and school leaders about their districts' capacity for organizational learning, organizational culture, and social ties around research evidence. Our results suggest a decrease in the district's capacity to diffuse ideas from research between Years 1 and 3, which may inhibit efforts for improvement. Further, the data on school and district leaders who did not leave the district indicates a decrease in the perception of organizational learning and culture in school sites, but not in the district with differences between principals and central office staff. Qualitative findings support an association between the restructuring and changes in organizational learning and social structures and provide further reasons for the changes (e.g., lack of communication, time to maintain/build relationships, and opportunities for professional development). These findings speak to the importance of leaders focusing on the social side of change during times of churn, including strengthening trust, fostering collective values and beliefs, and countering division.