In the realm of mental health promotion and public mental health, a consistent acknowledgment has prevailed, recognizing the imperative to enhance mental well-being while concurrently preventing mental illnesses. Such recognition extends to the pivotal role that healthcare providers’ overall health plays in their capacity to deliver comprehensive and quality patient care. This study embarked on a journey to illuminate the mental well-being landscape of healthcare workers within the ambit of Chong Hua Hospital, spanning the tumultuous peripandemic period and beyond. Employing a quantitative research design, the standardized Warwick-Edinburgh Mental Well-Being Scale (WEMWBS) was methodically administered to discern the intricate threads of mental well-being. The study’s findings stand poised to serve as the cornerstone for the crafting of an institutional mental health program, meticulously tailored to the diverse needs of healthcare workers within the hospital. Results revealed that resident doctors and the PGIs while generally reporting a high level of mental well-being in the peripandemic period, a sizeable proportion of these medical healthcare workers still succumbed to manifesting poor mental well-being. The paper also proved that married and those who contracted the infection were a notable cohort who recorded a significantly poorer mental well-being. The need to prioritize well-being immediately and after the pandemic so that services are sustained cannot be overemphasized hence the myriad of recommendations for a comprehensive and sustainable institutional mental health program was proposed in this paper.