The Structural & Thermal-Fluids Engineering Group develops first-of-a-kind prototype systems across underwater, ground, air, and space domains for high-impact national security missions. Engineers work on advanced structural and material systems for space-based imaging and laser communications, thermal management solutions from cryogenic to hypersonic regimes, and aerodynamic design and assessment for unmanned aerial vehicles, airborne pods, and hypersonic platforms. Solutions are realized through the integration of high-fidelity analytical and computational modeling, multidisciplinary simulation, environmental testing, and advanced materials, addressing demanding performance, size, weight, power, and environmental constraints that are at the forefront of current engineering capabilities. The Group offers a collaborative, hands-on environment where engineers pair deep analytical expertise with direct ownership of hardware development, integration, and testing. Engineers are supported in their growth through mentorship and opportunities for increasing technical and programmatic leadership, participation in conferences and professional societies, and direct engagement with mission partners and government sponsors. Thermal Engineering expertise is required to support the prototyping efforts that span these ranges of applications. Engineering solutions are developed through the utilization of appropriate technologies coupled with high-fidelity models and multidisciplinary simulations, environmental and performance characterization testing, and the utilization and development of advanced materials to optimize solutions to meet ever increasing performance, size, weight, and environmental challenges.