In the wake of welfare reform, thousands of low-income single mothers have transitioned into the labor market. In this article, the authors examine how the work conditions of mothers leaving welfare for employment are associated with the emotional well-being of 372 children ages 5 to 15 years. The authors examine the cumulative incidence, over a 5-year period, of maternal non-family-friendly work conditions, including long work hours, erratic work schedules, non-day shifts, and lengthy commute times, in association with children's internalizing and externalizing behavior problems and levels of positive behavior. The authors found that mothers' lengthy commute times are associated with higher levels of internalizing problem behaviors and lower levels of positive behaviors.