Purpose: This study explores nurses' poor performance in public hospitals has sparked a serious debate among healthcare providers all around the world, with an especially high number of patient complaints, particularly in Malaysia. Maintaining employee execution in the current setting is highly a problem since there is most drastic replacements have occurred in the corporation. Globalization is one of the key drivers of organizational changes, particularly in the healthcare industry. Thus, adaptive performance has been recognized as a viable option for nurses working in critical units as they deal with unpredictability and drastically changing performing conditions at the units including the emergency department (ED). Hence, nurses' capability to cope with and adjust themselves to changes quickly is known as adaptive performance, which further improves their performance and reduces patient complaints. Therefore, this analysisfocusto examine the component that contributesto improving adaptive performance among ED nurses. Theoretical Framework: To examine the relationship between nurses' Big Five Personality Traits (PT) and adaptive performance (AP), as well as the role of work engagement (WE) as a mediator between PT and AP.