The study focuses on key characteristics that affect diversity management (DM) in the United States. Developing effective strategies to support and enhance workforce diversity is a competitive business advantage as diverse workforce economic and social contributions outpace homogeneous workgroups. The purpose of this multiple case study was to explore the strategies that service organization leaders (diversity practitioner-leaders) use to develop DM programs to support competitive business advantage and sustainable growth. The general systems theory and DM framework were the lens that guided the study. Five diversity practitioner-leaders from service organizations with business operations in the northwestern region of United States were interviewed. Participants responded to open-ended interview questions. Data collection processes included validating and triangulating the information gathered from participants via transcript review and use of archival business documents and peer-reviewed sources. Following the thematic data analysis, major themes emerged that include linking diversity programs to business goals, educating and creating diversity awareness, and implementing diversity reporting and accountability. Findings revealed strategies that diversity practitioner-leaders could use to enhance workplace DM practices and support sustainable business growth. The study findings could help organizational leaders to affect positive social change by building diverse, welcoming, and all-inclusive workplace cultures, whereby all employees can strive to achieve their full potential, thus improving employee engagement and productivity. As workplace diversity improves, employees' engagement and productivity increases as well as their socioeconomic contributions.