Purpose: To investigate how a partnership between labor and management works to change the organization and focus of nursing home frontline work, supporting a transition toward person-centered care (PCC) in participating nursing homes. Design and Methods: Using a participatory research approach, we conducted case studies of 2 nursing homes participating in a partnership between a labor union and a provider coalition. The study was designed to reveal whether and how the labor-management partnership supported PCC and to identify challenges to overcome in the future. Results: The partnership provided training and follow-up support to member homes to implement PCC. Management and worker participants used the partnership as a learning collaborative to acquire PCC knowledge and to share implementation experience. Key elements of the implementation in each nursing home were translation of the larger labor-management partnership to each member nursing home, management innovations that developed and supported PCC, and conduct of union actors in each nursing home that supported PCC while maintaining traditional union protections. Frontline workers exhibited strong engagement in PCC practices. Implications: A partnership between labor and management can foster changes in the organization of frontline work aimed at improving nursing home residents' quality of life and care.