The benefits of sectoral workforce development programs to the working poor were examined in a 3-year longitudinal study of participants in six sectoral employment training programs across the United States. The programs, which were all designed to serve low-income clients, provided training in a diverse set of industries, including the following: construction trades; garment industry occupations; machining; metalworking; paraprofessional health occupations; and business services. Of the 732 respondents interviewed at baseline, 543 completed the survey administered 1 year later (response rate, 74%). In the year following training, respondents' earnings showed dramatic improvement because of increases in both hours worked during the year and earnings per hour. More participants reported having worked during the year following training than in the year before training. After training, the quality of respondents' jobs improved, and they generally had access to better benefits. The respondents' training completion rates were quite high, as was the percentage of respondents who reported using their training on the job. Thirty-six percent of respondents reported enrolling in other training/education after attending training in the sectoral program. (A technical note comparing the characteristics of wave 2 and wave 1 respondents is appended. Twenty-six tables/figures are included.) (MN)