Board-level human capital diversity and financial performance: The moderating role of ESG

This study examines whether organizational environmental, social and governance (ESG) performance moderates the association between board-level human capital diversity and organizational financial performance. Board gender diversity, board international background diversity and board educational discipline diversity represent observable dimensions of director composition relevant to strategic human resource management. A balanced panel of 132 non-financial Malaysian ESG-index constituents provides 528 firm-year observations for 2021–2024. Firm fixed-effects regressions with firm-clustered robust standard errors use return on equity (ROE) as the financial outcome. International background diversity and educational discipline diversity have positive direct associations with ROE; gender diversity has weaker statistical support. In the reported interaction model, each diversity dimension interacts positively with ESG performance. However, that model omits the ESG main effect and requires re-estimation before confirmatory interpretation. Supplementary investment and governance variables retain their original financial meanings. The study offers a board-level human capital perspective on director selection, development and the organizational context of diversity. It does not measure employee performance, HR practice implementation or service quality. Its practical implications concern aligning director development and board competency assessment with sustainability responsibilities.