The Administrative Core will provide the governance and coordination structure to spearhead the Atlas generation in the JMN-MSMP. The Administrative Core will coordinate and integrate the Biological Analysis Core (BAC) and Data Analysis Core (DAC), and will ensure harmonization of processes and quality control within the JMN-MSMP and with the SenNet Consortium Organization and Data Coordination Center (CODCC) to provide standardized, high-quality datasets for Atlas generation. The MPIs will engage all key stakeholders in shared governance to ensure that perspectives from all components are considered. This will be achieved through an Executive Committee (EC) consisting of the MPIs, and Core Leaders. The AC will coordinate monthly meetings of the EC to review operations, benchmarks, and metrics for continuous quality improvement; provide a forum to introduce emerging opportunities of interest; and formulate action plans for a coordinated response. Internal and External Advisory Committees will provide regular, expert, arms-length advice on scientific decisions, review progress, and assist with conflict resolution. The Administrative Core will work closely with the NIH program manager and external TMCs and data coordinating centers to communicate processes and datasets. Aim 1. Provide JMN-MSMP interdisciplinary leadership and governance structure. Aim 2. Oversee and Coordinate the Biological Analysis and Data Analysis Cores. Aim 3. Coordinate with other SenNet sites to standardize operations and protocols; and prepare, organize, and maintain JMN-MSMP reports and Atlas development.