About Leidos Gibbs & Cox Leidos Gibbs & Cox, the largest independent naval architecture and marine engineering firm in the United States, has been shaping the maritime industry since 1929. Our designs have supported 24 classes of naval combatants and nearly 7,000 vessels worldwide. Today, we continue to deliver innovative solutions across the full lifecycle of marine design, construction, and sustainment-supporting both U.S. and international military and commercial clients. We are currently s