Legacy System Modernization with Incremental Assurance

The contract seeks to develop and implement strategies for incrementally integrating formal methods into legacy systems, with the goal of enhancing assurance and reliability without requiring complete system rewrites. This approach emphasizes pragmatic retrofitting of rigorous verification techniques—such as model checking, theorem proving, and specification-based validation—into existing software architectures, allowing organizations to progressively strengthen trustworthiness while preserving operational continuity. The effort must focus on scalable, cost-effective methodologies that can be applied across diverse, aging platforms commonly found in critical infrastructure and defense environments. This subcontract, issued under the Department of Defense through the Defense Advanced Research Projects Agency, falls under NAICS code 541511 for custom computer programming services. The solicitation was posted on May 4, 2026, with proposals required by June 12, 2026, at 5:00 PM. While no specific place of performance or set-aside details are provided, the work is expected to involve close collaboration with technical teams familiar with legacy system constraints and formal verification toolchains. The successful proposer will need to demonstrate prior experience in bridging traditional software maintenance with modern assurance practices, showing how incremental adoption can reduce risk, meet compliance goals, and extend the lifecycle of systems otherwise deemed too costly or complex to replace.