| Business | Phone |
| A-Ok Controls Engineering Inc 225 W Morley Dr, Saginaw 48601 | (989) 753-7000 |
| Incal Technologies Inc 3870 E Washington Rd, Saginaw 48601 | (989) 758-0950 |
| William A Kibbe & Assoc Inc 1475 S Washington Ave, Saginaw 48601 | (989) 752-5000 |
| Wineman Technology Inc 1668 Champagne Dr N, Saginaw 48604 | (989) 771-3000 |
| Troy Design 225 E Morley Dr, Saginaw 48601 | (989) 753-9015 |
| Ultra Tek 4106 Firethorn Dr, Saginaw 48603 | (989) 791-2822 |