US · FMCSA ACTIVE HAZMAT
M S JOHNSTON CO INC
Hagerstown, MD 21742 · DOT 617518
Company profile
Web-discovered · as of 2026-07-30
M.S. Johnston Co., Inc. is a Hagerstown-based mechanical contractor specializing in HVAC, refrigeration design/build, and sheet metal fabrication, operating a private fleet of 30 power units for project deliveries.
Fleet use
Specialized service
Operating scope
Regional
Service model
dedicated
Equipment
specialized
Ownership
Private
Employees
11-50
HQ · 13261 Pennsylvania Ave, Hagerstown, MD 21742, USA
Active website with recent updates and LinkedIn profile/active registry status in 2026.
Registry record
Source FMCSA · as of 2026-08-01
Fleet size
30
power units
Activity
road freight carrier
private licence
In operation since
1995
30 drivers
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