A Subject Matter Expert (SME) is an individual with specialized expertise relevant to trial design, operations, safety, statistics, or a therapeutic area.
SMEs contribute to protocol development, endpoint definitions, eligibility criteria, and risk-based oversight strategies. Their input often strengthens scientific rationale, feasibility, and operational clarity, helping reduce downstream amendments. Sponsors may document SME involvement to demonstrate informed decision-making and appropriate competency in critical areas. SMEs also support issue triage and corrective actions when complex deviations, safety signals, or data anomalies arise.