| Business | Phone |
| Altair Engineering 65 Boston Post Rd W, Marlborough 1752 | (508) 480-9689 |
| Mdm Transportation Cnslnt 5 Mount Royal Ave # 15, Marlborough 1752 | (508) 303-0370 |
| Macneil Engineering Co Inc 289 Elm St, Marlborough 1752 | (508) 481-9030 |
| Kovacs Engineering Co 114 Sudbury St, Marlborough 1752 | (508) 229-2553 |