Research shows that nearly half of all children born in the US today will be eligible for child support before they reach the age of 18. Many low-income, noncustodial fathers -- who often struggle to make these payments -- will seek services from workforce development organizations. Yet, understanding the child support enforcement system can be challenging -- not only for noncustodial fathers but also for the workforce organizations that want to assist them. Navigating the Child Support System aims to help meet this challenge by providing information, resources and tools to use at the intersection of workforce development and child support enforcement. The guide is based on lessons from the Fathers at Work initiative, a three-year, six-site demonstration funded by the Charles Stewart Mott Foundation, which was designed to help young, noncustodial fathers achieve increased employment and earnings, involvement in their children's lives, and more consistent financial support of their children. The guide describes child support enforcement regulations, policies and actions that can affect fathers' willingness to seek formal employment and participate in the system, and provides examples of four services that organizations might offer to benefit fathers and their families. Navigating the Child Support System offers concrete suggestions for incorporating child support services into workforce organizations' assistance to low-income, male participants, including developing partnerships with local child support enforcement agencies. It includes seven tools for learning about child support and setting goals for enhancing services to noncustodial fathers.