| Business | Phone |
| Belcad Inc 222 Dillon St, Dubuque 52003 | (563) 583-2658 |
| Engineering Assistance 900 Cedar Cross Rd, Dubuque 52003 | (563) 556-4281 |
| Unison Design 2728 Asbury Rd, Dubuque 52001 | (563) 690-0937 |
| Unison Solutions 5451 Chavenelle Rd, Dubuque 52002 | (563) 585-0968 |