Indefinite Delivery Contract HQ085926DE209

OST Inc., doing business as Optimal Solutions And Technologies, was awarded a multiple-award Indefinite Delivery Indefinite Quantity (IDIQ) contract by the Missile Defense Agency (MDA) on December 29, 2025, with a ceiling value of $151 billion and an ultimate completion date of December 28, 2035. This contract, designated as the Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) IDIQ, represents a comprehensive, multi-domain defense procurement vehicle supporting national defense objectives through the development, production, and sustainment of advanced air and missile defense capabilities. Under this contract structure, OST Inc. shall provide all necessary materials, labor, equipment, and facilities required to deliver systems engineering, technical assistance, research and development, prototyping, weapon design, production, test and evaluation, and modernization services across classified and unclassified programs. The contract utilizes full and open competition with no set-asides, allowing the government to issue individual task and delivery orders across multiple NAICS codes and classification levels, leveraging advanced technologies including artificial intelligence, machine learning, digital engineering, and open systems architectures.

The SHIELD IDIQ contract is designed to enable the MDA and other Department of Defense entities to rapidly procure solutions for detecting, tracking, intercepting, and neutralizing threats to the United States homeland, deployed forces, allies, and friends across all phases of flight from ballistic, hypersonic, and cruise missiles, as well as advanced aerial attacks. The procurement encompasses protection against air, missile, space, cyber, and hybrid threats through a layered defense approach, with individual task orders potentially requiring facility clearances commensurate with classification levels ranging from unclassified to classified programs. As a pre-established IDIQ vehicle with multiple awardees, this contract provides the government with flexibility to issue orders for both research and development activities and operational systems support, positioning OST Inc. to contribute its extensive systems engineering and technical assistance capabilities to MDA's long-term homeland defense modernization objectives.