<p>Corporate Social Responsibility activities have played a key role in the sustainable development of organizations and those in emerging economies are not an exception. The study examines the impact of internal Corporate Social Responsibility activities on Organizational Commitment through the mediating role of Organizational Attractiveness. Mix methods were adopted with survey collected from 529 respondents and interviews with ten business leaders working for construction companies located in the Red River Delta region, northern Vietnam. Grounded in Social Identity Theory and Social Exchange Theory, the findings suggest that internal Corporate Social Responsibility implementation is a strong predictor for Organizational Commitment. This relationship is mediated by Organizational Attractiveness and moderated by Age. Alongside, it is uncovered in the interviews that construction firms’ leadership in Vietnam are shifting from the traditional profitability to a more sustainable development focus which are reflected in their policy and decision making. Special attention is paid to more regular training activities, workplace safety and extrinsic motivation. Willing to sacrifice short-term profit, business leaders are seeking more organizational commitment from the employees, as well as organizational attractiveness enhancement, showing a proactive leadership attitude toward creating a sustainable working environment. Recommendations are given for future research direction and business practices.</p>