Principal Systems Engineer / Systems Architect – Modular Weapons GRA

KBR is seeking a highly experienced Principal Systems Engineer and Modular Systems Architect to support a U.S. Government organization in advancing the Weapons Government Reference Architecture (GRA) and Weapons Open Systems Architecture (WOSA) for conventional weapon systems. The role focuses on extending the current architecture into an actionable Government-owned framework to expand the industrial base, accelerate technology innovation, and reduce integration costs. This position involves leading Model-Based Systems Engineering (MBSE) efforts and defining modular technical data packages to support competitive acquisition and scalable production.