Military rates & MOS with heavy asbestos exposure

Asbestos exposure in the military was concentrated in specific occupational specialties. Engineering, maintenance, motor pool, construction, and damage control crews handled asbestos products every shift — often without respiratory protection until the late 1970s.

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U.S. Navy rates

Navy engineering and damage-control rates had the highest documented asbestos exposure of any military occupation:

Boiler Technician (BT) — insulating, repairing, and tearing out boilers wrapped in asbestos blankets and refractory brick
Machinist's Mate (MM) — servicing turbines, pumps, valves, and steam piping with asbestos lagging and packing
Hull Maintenance Technician (HT) and Pipefitter — cutting, welding, and reinsulating asbestos-wrapped piping throughout the ship
Electrician's Mate (EM) — pulling and splicing asbestos-insulated cabling
Engineman (EN), Fireman (FN) — engine-room watch standers in continuous contact with asbestos-bearing equipment
Damage Controlman (DC) — fire-fighting drills with asbestos blankets, repair-locker work, fireproofing maintenance
Fire Control Technician (FC), Sonar Technician (ST), Radioman (RM) — equipment spaces with asbestos electrical insulation

U.S. Army MOS

Combat Engineer (12B) — demolition, construction, and rehabilitation work with asbestos-containing supplies
Motor Pool Mechanic (63 series) — brake jobs, clutch work, gaskets — classic asbestos-exposure roles
Construction Engineer (12N) — base infrastructure with asbestos roofing, floor tile, and pipe insulation
Quartermaster, fuel handlers, and base utilities — older base infrastructure handling and maintenance

U.S. Marines MOS

Motor Transport Operator (3531), Heavy Equipment Mechanic (1341) — same brake/clutch/gasket exposure as Army peers
Combat Engineer (1371), Engineer Equipment Operator (1345)
Aviation Mechanic (60xx series), Utilities (1161, 1171)
Marines embarked aboard Navy ships shared the shipboard exposure profile of the sailors they deployed with

U.S. Air Force AFSC

Aircraft Mechanic (2A series) — brake systems, engine insulation, gaskets across decades of airframes
Civil Engineer (3E series) — HVAC (3E1X1), pavements/equipment (3E2X1), structural (3E3X1), electrical (3E0X1)
Missile Maintenance (2M series) — silo-environment fireproofing exposure

U.S. Coast Guard rates

Damage Controlman (DC), Machinery Technician (MK), Electrician's Mate (EM), Boatswain's Mate (BM), Fireman (FN) — same exposure profile as Navy peers aboard cutters and at Coast Guard shipyards

Merchant Marine

Engineer Officers (Chief / 1st / 2nd / 3rd Engineer)
Oilers, Wipers, Firemen, engine-room ratings
Boilermakers and pipefitters at sea or in port

If your military occupational specialty involved engineering spaces, motor pool work, vehicle/aircraft maintenance, construction, or damage control, you were almost certainly exposed.