Local 139 – Boston

Local 139 proudly represents the skilled railroad mechanical workers employed by Keolis Commuter Services and Amtrak throughout the Greater Boston region. Rooted in one of America's most historic and hardworking cities, Local 139 embodies the grit, determination, and blue-collar pride that have defined Boston's workforce for generations.

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Our members play a critical role in maintaining the equipment and infrastructure that keep New England moving. From the busy commuter rail lines connecting communities across Massachusetts to the Northeast Corridor linking Boston to major cities along the East Coast, Local 139 members ensure that passengers travel safely, reliably, and efficiently every day.

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Known for their craftsmanship, professionalism, and commitment to excellence, Local 139 members perform the inspection, maintenance, repair, and fabrication work necessary to keep rail operations running at the highest level. Whether working in shops, maintenance facilities, or rail yards, they bring the same work ethic and pride that Boston has been known for since its earliest days as a center of industry, transportation, and innovation.

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Local 139 is more than a union local—it is a brotherhood and sisterhood of skilled railroad professionals dedicated to protecting good union jobs, advancing workplace safety, and strengthening opportunities for future generations. Through solidarity and hard work, our members continue to uphold the proud traditions of both SMART and the city they call home.

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As part of SMART's Railroad Mechanical & Engineering Department, Local 139 remains a strong advocate for fair wages, quality benefits, safe working conditions, and the dignity of skilled labor.

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"Built with Boston grit. Driven by union pride. Keeping New England moving one rail at a time."