Indefinite Delivery Contract HQ085926DF358

Mainstem LLC, operating as Blacklynx Services, was awarded a multiple-award Indefinite Delivery Indefinite Quantity contract by the Missile Defense Agency on December 29, 2025, with a ceiling value of $151 billion and a period of performance extending through December 28, 2035. This contract was issued under full and open competition with no set-asides and represents a new enterprise-wide contracting vehicle designated the Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) IDIQ. The contract will be utilized to procure an advanced, multi-domain defense system capable of detecting, tracking, intercepting, and neutralizing threats to the United States homeland, deployed forces, allies, and partners across air, missile, space, cyber, and hybrid threat domains.

Under this vehicle, Blacklynx Services will deliver research and development, prototyping, systems engineering, weapon design, production, test and evaluation, cybersecurity modernization, and disruptive technology solutions across multiple classification levels and security domains. The contract is structured to support both classified and unclassified programs and leverages advanced technologies including artificial intelligence, machine learning, digital engineering, and open systems architectures. Work will be performed across multiple North American Industry Classification System codes, with individual task and delivery orders utilizing various contract types to support the Missile Defense Agency and other Department of Defense entities in rapidly issuing orders under this flexible contracting mechanism. This ten-year contract represents a significant long-term investment in establishing comprehensive, layered homeland defense capabilities against advanced aerial, ballistic, hypersonic, and cruise missile threats across all phases of flight.