This brief—written by Evelyn Ganzglass—provides recommendations to inform governors, state legislators, state agencies, leaders in the postsecondary and public workforce systems, and other key stakeholders of the actions needed to build statewide longitudinal data systems that measure the educational transitions, completions, and labor market outcomes of adult students and workers. These actions are essential for improving educational and skills development practices, policies, programs, and strategies that serve the largest portion of our future workforce—adults who are in the workforce today.