The broad community of companies, organizations, and subcontractors that provide goods and services to the Department of Defense (DoD). The defense industrial base (DIB) companies span manufacturers, technology providers, logistics companies, and professional services firms. Because of its size and critical role in national defense, the defense industrial base companies are a frequent target for cyberattacks, making strong cybersecurity practices essential across the supply chain. Utilizing managed cyber security services and other managed security solutions can significantly enhance the protection of these companies against threats.