Overview Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visitperaton.comto learn how we’re keeping people around the world safe and secure. Responsibilities Peraton is seeking a Senior Software Architect SME to supportthe Space Exploration Networks Services and Evolution (SENSE) contract at NASA’s Goddard Space Flight Center (GSFC), in Greenbelt, MD.This role will lead the architecture review, documentation, and modernization of a large-scale legacy ground system codebase supporting NASA Space Relay network operations. The right candidate brings deep experience with legacy systems, a track record of leading technical teams through complex software recoveries and the ability to operate effectively in a structured government program environment.Peraton is the prime contractor for NASA at the White Sands Complex (WSC) near Las Cruces, New Mexico. Operating here are two functionally identical satellite ground terminals: The White Sands Ground Terminal, and the Second TDRSS Ground Terminal. These ground terminals ensure uninterrupted communications between various ground stations, NASA’s orbiting fleet of Tracking and Data Relay Satellites (TDRS), customer spacecraft (satellites), and the computer systems that support such spacecraft. WSC serves as an interface for distributing satellite data to control centers and scientists who then use the daily influx of data to expand our ever-growing knowledge of the Earth and the universe.Responsibilities / What you’ll do…Co-lead the Architecture Definition Review of legacy codebase which is a 35-year-old ground system written in Fortran, Ada, C, and C++Develop and update technical architecture documentation for a legacy system to close knowledge gaps and support long-term sustainmentMentor a team of software engineers through a structured modernization and platform rehost effort, especially using AI tools and methods to gain efficiency.Define and implement software development processes, toolchain standards, and CI/CD pipelinesDrive adoption of agile methodologies including sprint planning, peer estimation, and Definition of Done enforcementDirect AI-assisted code comprehension workflows using NASA-approved toolsSupport the development of backend effort estimates grounded in architecture analysisCoordinate with NASA task monitors and program leadership on technical progress and formal review gatesMaintain and evolve technical documentation as a living knowledge base in support of long-term program sustainment Qualifications REQUIREDBachelor's degree in Computer Science, Software Engineering, or related technical field and 10 years of experience; Master's degree and 7 years of experience.Security clearance - this position requires the candidate to be able to obtain a DoD Secret security clearance and to maintain the clearance thereafter. You must be a US Citizen and show proof of citizenship.Demonstrated experience reading, analyzing, and reverse-engineering legacy codebases in one or more of the following languages: C, C++, Fortran, Ada.Demonstrated experience using AI to assist in code comprehension and documentation is a plusExperience leading formal architecture reviews of systems the candidate did not originally build, including undocumented or minimally documented systemsHands-on experience with Linux/Unix-based development environmentsExperience with relational databases (PostgreSQL, Oracle, or equivalent)Proficiency with version control systems (GitLab, GitHub, or equivalent)Experience establishing or operating within CI/CD pipelines (GitLab CI, Jenkins, or equivalent)Experience with agile/iterative development methodologies including sprint planning, backlog management, and Definition of DoneExperience with JIRA or equivalent agile project tracking toolsDemonstrated experience leading software development or architecture teams of 5 or more engineersExperience In programs with formal configuration management, change request processes, and review gates in a government or DoD/NASA environmentAbility to develop and maintain technical documentation for legacy systems with little or no existing documentationPREFERREDExperience with NASA ground systems, space relay systems, or mission-critical ground softwareFamiliarity with AI-assisted code comprehension tools (e.g., AskSage or equivalent approved government AI platforms)Experience building or directing API-driven or RAG-based code analysis workflows using PythonExperience with Oracle, MSSQL; Postgres preferredExperience migrating legacy codebases from end-of-life platforms (hardware or OS) to modern environmentsFamiliarity with MBSE tools (e.g., MagicDraw/Cameo)Experience with Confluence for technical knowledge management