| Business | Phone |
| V N Engineers Inc 116 Washington Ave # 4, North Haven 6473 | (203) 234-7862 |
| Diversified Technology Conslnt 556 Washington Ave, North Haven 6473 | (203) 239-4200 |
| H P Engineering Consulting 15 Maiden Ln, North Haven 6473 | (203) 239-9425 |
| Heynen Engineers 11 Peck St, North Haven 6473 | (203) 985-8133 |
| Innovative Engineering Svc Llc 139 Middletown Ave # 2a, North Haven 6473 | (203) 234-8977 |