The economic prosperity of our nation is dependent upon massive networks of infrastructure systems including transportation networks, waterway networks, pipelines, and electrical grids, just to name a few. Furthermore, urban environments can be viewed as a “system of systems” with complex interactions and interdependencies existing between individual systems. Historically, the civil engineering profession has emphasized the resilient design of the individual infrastructure components that make up these systems. Comparatively less attention has been paid to how infrastructure components interrelate and interact to make up a dynamic system. As a result, recent natural catastrophes such as Hurricane Katrina (2005) and the Northridge Earthquake (1994) have revealed that society is vulnerable to catastrophic cascading failures that occur due to a lack of resiliency in the points of interconnection between individual infrastructure systems. Today, infrastructure systems are growing even more interdependent through information and sensing technologies being introduced for the monitoring and control of infrastructure systems. As urban environments grow to keep pace with trends in population densification, a balance must be struck between community resiliency and sustainable use of natural resources. This is fundamentally a systems problem defined by the flow of the natural resources that go into the construction and operation of infrastructure system and the negative consequences (e.g., greenhouse gases) that result over the full life-cycle of infrastructure systems. This program area emphasizes the analysis, design, and optimization of civil infrastructures, using the concepts from systems theory, information theory, decision theory, and sustainable design. The program also focuses on the enhancement of resiliency and sustainability of infrastructure systems via integration of nontraditional technologies, such as embedded sensing, intelligent control, and advanced materials technologies.