John O'Mahony
Electrical contractor · works on industrial property · active Jan 2010 – Jun 2026.
2,138
Permit jobs
66
Properties
1
States active
1
Counties active
$78.0M
Permit valuation
50
Trades
Trade breakdown
Permit jobs by trade (top 15).
Electrical
2,138
General Building
2,135
Flooring
521
Fire / Hazmat
378
Fire Alarm
317
Alteration / Remodel
272
Low Voltage
113
Demolition
109
Mechanical / HVAC
93
Addition
91
Electrical Service / Panel
74
Data / Communications
65
Air Conditioning / Heat Pump
32
Fence / Wall
26
Kitchen / Bath Remodel
24
Where they work
Massachusetts
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Stats are derived from construction permits and work events attributed to this contractor. Fields are shown only where sourced; valuation shown only when the source figure passes quality checks.