| Business | Phone |
| Amec 15 Franklin St, Portland 4101 | (207) 879-4222 |
| Aquarion Engineering Svc 222 Saint John St # 314, Portland 4102 | (207) 828-1272 |
| Haley & Aldrich Inc 75 Washington Ave # 203, Portland 4101 | (207) 772-5439 |
| Sanborn Head & Assoc 95 High St, Portland 4101 | (207) 761-9300 |
| Mactec Consulting & Engineerin 511 Congress St # 2, Portland 4101 | (207) 775-5401 |
| Drumlin Environmental Llc 75 York St, Portland 4101 | (207) 771-5546 |
| Woodard & Curran Inc 41 Hutchins Dr, Portland 4102 | (207) 774-2112 |