Billie Alban and Barbara Bunker are internationally known consultants and leaders in the practice of Organization Development (OD). Alban and Bunker strive to help clients improve their organization's effectiveness in managing change. Their work includes strategic planning, executive team development, and work to improve cross-functional relationships between key areas. They are active in training others in the field of Organizational Development. Much of their recent work has focused on Large Group Interventions that bring the organization and its stakeholders together to work on strategic issues, a common direction, and commitment to action. In addition, they have developed programs for several companies for training their Human Resource people in Organizational Development skills.

Their groundbreaking book, Large Group Interventions: Engaging the Whole System for Rapid Change (1997), creates a framework for the use of these new large group methods and is a classic in the OD literature.

In their practice they work with business, education, government, non-profit organizations, and communities. They both have extensive experience in cross-cultural work.