Objective: To characterize the incidence, clinical phase, team responsibility, and behavioral drivers of non-technical errors (NTEs) associated with death in emergency general surgery to inform future NTS improvement strategies. Background Data: Deficiencies in surgical non-technical skills (NTS) contribute substantially to patient harm. Emergency general surgery is common, complex, and high-risk, yet characteristics of NTEs remain unknown. Methods: Retrospective cohort study including all emerg