Construction industry leaders who neglect to implement appropriate project funding strategies harm business operations and lose profits. Inadequate funding is also a significant cause of project failures in the global construction sector. The purpose of this qualitative multiple case study was to explore strategies construction project owners use to secure sustainable funding for the successful conclusion of infrastructure projects. The population comprised 5 leaders of organizations owning construction projects in the Middle Eastern Gulf Cooperation Council states, with successful strategies to acquire adequate funding for completing infrastructure projects. Data were collected from semistructured interviews with the business leaders and reports published by prominent organizations involved in funding infrastructure projects. The modern portfolio theory formulated the conceptual framework. Through thematic analysis, 5 themes emerged: address project funding issues promptly, select projects with high returns and low risks, use project financial management processes to manage project funds, apply a project finance structure for large-scale projects, and implement an Islamic finance scheme for eligible projects. The potential contributions of the study include communities benefitting from improved well-being and construction business employees enjoying higher job security, enhanced working conditions, and better standards of living for their families.