Marine Corps Asbestos Exposure by Job (MOS)

Which Marine Corps jobs carried the heaviest asbestos exposure — motor transport operators and mechanics, combat and engineer equipment specialists, and utilities and boiler technicians — and the friction, gasket, and insulation products behind each.

Asbestos exposure in the Marine Corps was not evenly distributed. It concentrated in the jobs that put a Marine in daily contact with friction materials, gaskets, packing, and insulation — the maintenance and utilities specialties. A Marine’s military occupational specialty (MOS) is often the clearest single indicator of how, and how heavily, they may have been exposed.

This page maps exposure to the job specialties most affected. For the equipment behind these jobs, see Marine Corps Equipment & Asbestos Exposure; for installation exposure, see Marine Bases & Barracks.

Motor Transport Operators and Mechanics

Motor transport was the most direct route to vehicle asbestos exposure. Marines who drove and maintained the truck and tactical-vehicle fleet handled brakes and clutches constantly. The brake shoes and linings, clutch friction facings, and engine and exhaust gaskets on these vehicles were allegedly asbestos-based. Removing and reinstalling brake and clutch assemblies, grinding linings to fit, blowing out brake drums with compressed air, and scraping old gaskets all released asbestos dust into the mechanic’s breathing zone.

Combat Engineers and Engineer Equipment Operators

Marines in the engineer specialties operated and maintained heavy construction and combat equipment — bulldozers, graders, loaders, and tracked machinery. Like all heavy equipment of the era, these machines used asbestos-based brake bands, clutch facings, and gaskets to survive the heat and load they worked under. Field maintenance on this equipment, often improvised and without dust controls, put engineer Marines in close contact with friction and gasket dust.

Utilities, Boiler, and Facilities Technicians

Marines in utilities and facilities specialties maintained the steam plants, boilers, water heaters, and building systems on installations. This work meant handling asbestos pipe covering, block insulation, boiler jacketing, and gaskets and packing on valves and pumps. Cutting and fitting pipe insulation, tearing out old lagging during repairs, and repacking valves released fibers in confined mechanical spaces. This is the same exposure pathway described on the Marine Bases & Barracks page.

Matching Jobs to Civilian Trades

The way a Marine was exposed usually mirrored the way a civilian in the same trade was exposed. These occupation pages on Asbestos-Products.com describe the exposure pathway for the trades behind these MOSs:

VA Benefits vs. a Civil Product Claim

There are two separate paths, and they do not cancel each other out.

A VA disability claim is filed directly with the U.S. Department of Veterans Affairs. It is a government benefit for a service-connected condition, not a lawsuit. No attorney is required to file it, and a Veterans Service Organization such as the DAV, VFW, or American Legion will help a veteran file at no cost. Start at VA.gov › Hazardous Materials Exposure.

A civil product claim is a separate matter against the private companies that made and sold the asbestos-containing products — never against the Marine Corps or the government. That is the lane an asbestos attorney handles. A civil claim runs in parallel with VA benefits; pursuing one does not reduce or affect the other. If you served in the Marine Corps, were exposed to asbestos, and have been diagnosed with an asbestos-related disease, you may have a legal claim against those manufacturers.