Rocket Assembler Code Refactoring is an advanced modernization solution designed to automatically convert outdated Assembler code into structured pseudocode or modern programming languages like COBOL, C, or Java, all while preserving the original external behavior. This approach helps facilitate quicker and safer modernization efforts, ultimately enhancing maintainability. Given that Assembler code often suffers from density, lacks thorough documentation, and is increasingly supported by a dwindling number of experts, maintenance can become cumbersome, expensive, and prone to errors. The solution effectively counters these issues by providing transformations that maintain semantics and are auditable, leading to fewer outages and ensuring secure modernization without compromising system stability. The core engine operates fully automated, utilizing mathematically assured logic equivalence to mitigate conversion risks, which significantly speeds up projects and guarantees that the outputs remain semantically consistent with the initial code. As a result, organizations can transition their legacy systems with confidence, ultimately leading to improved operational efficiency.