| Business | Phone |
| Environmental Engineering 9842 Country Club Cir, Twinsburg 44087 | (330) 487-0740 |
| Mechanical Systems 9337 Ravenna Rd, Twinsburg 44087 | (330) 963-7760 |
| Prestan Products 1750 Highland Rd # 4, Twinsburg 44087 | (330) 487-5700 |
| Sorbtech 1664 Highland Rd # 10, Twinsburg 44087 | (330) 425-2354 |
| Wiss Janney Elstner Assoc Inc 1869 E Aurora Rd, Twinsburg 44087 | (330) 487-1100 |