Different from a classic Weberian bureaucracy, public service bureaucrats directly interact with citizens at the frontlines of government. These first responders use their discretion to meet some citizens’ needs but deliberately overlook the other clients. What lies beneath the street-level bureaucrats’ behavior in their contacts with citizens? This study develops a model to explain how street-level bureaucrats are motivated to move toward the public and the extent to which they are engaged in helping their citizens. The model is driven by costs and benefits of behavior based on the assumption that street-level bureaucrats are rational actors trying to maximize their utility. However, utility here is defined as more than self-interest; it is the set of outcomes valued by the bureaucrats such as reducing job-related stress, pursuing work-generated ends, serving needy citizens, and implementing good public policy.