Organization development (OD) practitioners can be internal or external consultants who offer professional services to organizations. They specialize in fields like organization design, quality management, and business strategy. They help managers apply OD concepts in their work areas. Effective OD practitioners have strong interpersonal, conceptual, analytical, and consultation skills. They understand theories of planned change and how to design and implement interventions. Practitioners must manage relationships with external stakeholders and understand power dynamics and value conflicts between organizations. They are expected to promote collaboration while also considering competitive pressures. Practitioners must perform their helping role ethically and avoid misconduct or abusing their professional power and clients.