Title: Cofounder and Cochair, the Bill and Melinda Gates Foundation
Children: Jennifer (18), Rory (15), and Phoebe (12)
As cofounder of the Bill and Melinda Gates Foundation, Melinda is responsible for the strategies and direction of the foundation, the goal of which is to "improve equity in the United States and around the world." She told The Telegraph: "I care much more about saving the lives of mothers and babies than I do about a fancy museum somewhere. Knowing you've got a family started on a path to self-sufficiency, that is job satisfaction."
To see who else made Working Mother's top 50 list, head over to its site. Do you agree with the magazine's picks?