This study, "Gender Balance Boards: Striking a Balance Between Risk and Sustainability," critically analyses the significance of gender-balanced boards in improving organizational risk management practices and sustainability orientation among listed Multinational Corporations and Commercial banks in Nigeria. The study was prompted by growing awareness that corporate governance structures often fail to address strategic risk oversight and long-term sustainability goals in increasingly uncertain business environments. This study examined how board gender diversity affects organizational risk management practices and how these practices, in turn, shape sustainability governance. The study used a positivist paradigm and a quantitative explanatory research design, drawing on secondary panel data from audited annual reports, sustainability disclosures, and corporate governance reports of sampled Nigerian listed firms from 2015 to 2024. The study used descriptive statistics, correlation, and multiple regression techniques. The results showed that gender diversity on the sampled companies' boards significantly enhanced organizational risk management effectiveness and positively affected sustainability orientation. The findings also confirmed that gender-balanced boards led to stronger governance accountability, greater stakeholder responsiveness, and better sustainability disclosure practices. The study concluded that inclusive governance structures were strategic mechanisms to enhance institutional resilience and sustainable corporate governance in emerging economies. Thus, the study called for greater substantive involvement of women in corporate leadership structures in Nigeria, with regulators and organizations committing more.