Background Thirty-six percent of females are employed in Bangladesh, many in the readymade garments manufacturing industry. Inadequate access to health information, care, and long working hours makes exclusive breastfeeding particularly challenging for these employed mothers. Research aim To describe the influence of a breastfeeding education and support program on breastfeeding patterns of mothers working in garment and other factories in Bangladesh. Methods A descriptive two-group prospective, mixed methods, longitudinal prospective study was conducted from May 2015 to March 2017. Peer counselors were trained to provide home-based counseling from 6 months of pregnancy until infants completed 6 months for pregnant and lactating factory workers and neighboring unemployed women. The total evaluation sample ( N = 304) consisted of participants still employed ( n = 190) and unemployed ( n = 144). Peer counselors recorded socioeconomic information, weights, and infant feeding patterns. Descriptive statistical analyses examined the peer counselors’ influence on breastfeeding practices. Results Initiation of breastfeeding within 1 hr was high in both groups, 173 (91%) among the employed, and 101 (89%) among the unemployed participants. Exclusive breastfeeding at 6 months was reported by 107 out of 125 (86%) of the employed participants versus 72 out of 76 (95%) of those unemployed. Conclusions Community-based peer counselors can help to inform, encourage, and support both factory workers and unemployed women with optimal breastfeeding patterns. Factories who have female workers should consider employing outreach peer counselors as part of their community social responsibility, and as a way to contribute to the sustainability of these programs.