| Business | Phone |
| Brown & Roberts Inc 1 W Ridge Rd, Harrisburg 62946 | (618) 252-8111 |
| E Miller Engineering Inc 1457 Highway 145 S, Harrisburg 62946 | (618) 253-6017 |
| Walker & Assoc 102 N Gum St, Harrisburg 62946 | (618) 252-7944 |
| Walter S Lucas Consulting 617 E Church St, Harrisburg 62946 | (618) 252-1327 |