| Business | Phone |
| Advanced Beacon 178 Spruce St, Watertown 2472 | (617) 924-9060 |
| United Electrical Control 85 School St, Watertown 2472 | (617) 923-8124 |
| C L Salemis Electric 216 Waverley Ave, Watertown 2472 | (617) 926-0052 |
| Sartori Electric Co 10 Dewey St, Watertown 2472 | (617) 924-0700 |
| Christakis Electric Co 158 Common St, Watertown 2472 | (617) 926-1296 |
| Positive Connection Co 30 Templeton Pkwy, Watertown 2472 | (617) 924-1440 |
| Prime Electrical Corp Watertown 2472 | (617) 926-6064 |
| Francis G Curran Watertown 2472 | (617) 926-1619 |
| D & R Electric Co 114 Dexter Ave # A, Watertown 2472 | (617) 926-4560 |
| D'Attilio Electric Co Watertown 2472 | (617) 244-0911 |
| Electrical Control Engineering 118 Main St # 6, Watertown 2472 | (617) 926-2525 |
| Hawes Electric Construction 1 Merchants Row, Watertown 2472 | (617) 924-3954 |
| Lampasona & Bloomer Electrical 1 Summer St, Watertown 2472 | (617) 924-8866 |