| Business | Phone |
| A One Engineering Inc 6250 Grand Central Ave, Parkersburg 26105 | (304) 684-5685 |
| Apex Engineering Inc 100 Star Ave 120, Parkersburg 26101 | (304) 424-7300 |
| Barr Engineering Inc 4420 Rosemar Ctr, Parkersburg 26104 | (304) 422-5240 |
| Briggs Engineering 3901 Briscoe Run Rd, Parkersburg 26104 | (304) 485-5414 |
| Chemstress Consultant Co 8409a Emerson Ave, Parkersburg 26104 | (304) 464-5191 |
| Waterman-Douglass & Assoc Pllc 533 Rosemar Rd, Parkersburg 26104 | (304) 428-5715 |