| Business | Phone |
| Andean Minerals Development 5150 S Florida Ave, Lakeland 33813 | (863) 648-1364 |
| Petronu Engineering 2634 Hickory View Loop, Lakeland 33813 | (863) 286-2754 |
| Zimtech Engineering Corp 5703 Antler Trl, Lakeland 33811 | (863) 668-8561 |
| Jacobs Engineering Group 3149 Winter Lake Rd, Lakeland 33801 | (863) 669-2265 |