| Business | Phone |
| Whitman & Bingham Assoc Llc 510 Mechanic St, Leominster 1453 | (978) 537-5296 |
| S J Mullaney Engineering Inc 305 Whitney St, Leominster 1453 | (978) 534-3131 |
| Hamwey Engineering Inc 14 Manning Ave # 308, Leominster 1453 | (978) 840-2964 |
| Hannigan Engineering 8 Monument Sq, Leominster 1453 | (978) 534-1234 |