Issues related to human resource development (HRD) and lesbian, gay, bisexual, and transgender (LGBT) people such as workplace inclusion, employee affinity groups, and LGBT-specific diversity initiatives are being addressed in organizations more often now than ever before. This article explores the existing literature on LGBT issues in HRD and adult education through a systemic review to determine what research exists and what future directions are necessary. This review revealed a small core of research related to these issues. Existing work is mainly conceptual, and there is a lack of quantitative work. Topics of focus are related to organizational change and diversity efforts, with very little research on HR policy, career development, and workplace education. Key findings include that HR professionals have primarily served in a reactive role, rather than leading on these issues. (Contains 2 tables.)