Abstract: Wellbeing and mental health is a fundamental component of occupational health and safety required for safe engineering and construction project delivery. Through a thorough literature review and questionnaire survey of 152 engineers and construction workers in the Nigerian Construction Industry (NCI), this study identified and explored the factors affecting wellbeing culture and mental health among engineering and construction professionals in Nigeria. Our findings reveal Decrease in job satisfaction and Reduction in Productivity respectively are the highest impacts of poor wellbeing culture and mental health of construction workers in Nigeria. Furthermore, Enforcement of regulations that prioritize mental health considerations in urban planning and development and Regular training and education programs should be implemented to raise awareness will help to improve wellbeing culture and mental health among construction workers in Nigeria. Hence, there is a need for regular awareness workshops and training, policies supporting work-life balance, and accessible counselling services to promote mental health and wellbeing in the Nigerian Construction Industry.

Keywords: Wellbeing Culture, Mental Health, Construction, Engineering, Nigeria.

| DOI: 10.17148/IARJSET.2025.125223