Senior Software Architect in Charleston, South Carolina to lead development of software architectures supporting Navy HPTE systems, with emphasis on PLC-based control environments. The candidate will define modular, scalable software architectures and ensure integration with system architecture in a simulatable manner using MagicDraw / Cameo Systems Modeler. Responsibilities • Lead software architecture design for control systems, integration layers, and mission applications • Architect and integrate PLC-based systems (e.g., Rockwell, Siemens) into software environments • Define interfaces for real-time control, telemetry, and system coordination • Develop UML-based architecture models in Cameo Systems Modeler • Ensure software architecture integrates with system architecture in a simulatable fashion Required Qualifications • Active DoD Secret clearance • Bachelor's degree in Software Engineering, Computer Science, or related field • 10+ years of software architecture experience • Ability and willingness to upgrade from secret to TS clearance Technical Skills • Experience with PLC systems (Rockwell, Siemens, or equivalent) • Proficiency in Model Driven Architecture (MDA) • Hands-on experience with MagicDraw / Cameo Systems Modeler • Strong UML modeling capability • Experience with APIs, middleware, and distributed systems • Familiarity with containerization and DevSecOps Preferred Qualifications • Familiarity with test systems or high-power/RF environments • Experience leveraging LLMs across wide range of classification levels • Understanding of MOSA principles Clearance: • Must have an active Secret Security Clearance