The increasingly diverse demographics of the United States and the rising share of educational and consequent financial capital possessed by people of color are beginning to force organizations across sectors to rethink models of success and how to ensure sustainability in the future. In the environmental sector, organizations are turning attention to diversifying management and leadership to better reflect the constituencies they serve. In order to do this effectively, mainstream environmental organizations must institute readiness, recruitment, and retention (3Rs) practices that integrate diversity, equity and inclusion into their mission and work. In terms of diversity, equity and inclusion, readiness refers to an organization’s capacity and preparedness to foster diverse viewpoints, support employees and partner organizations through inclusive and equitable practices and culture. Recruitment means the active procurement of diverse talent pools, and retention means building meaningful pathways to promotion and building affinity within the organization so that all differences are valued. 3R best practices are the tools by which an organization meets its diversity challenges, especially at the highest levels, and transforms into a truly inclusive work culture. 3R practices are critical to organizations remaining relevant and developing sustainable solutions to our most pressing environmental problems.