| Business | Phone |
| Aegis Engineering 3294 Ashley Phosphate Rd # 2f, North Charleston 29418 | (843) 225-8082 |
| B P Barber 4016 Salt Pointe Pkwy, North Charleston 29405 | (843) 767-4602 |
| Crg Engineering 7301 Rivers Ave # 200, North Charleston 29406 | (843) 266-0700 |
| Davis & Floyd Inc 3229 W Montague Ave, North Charleston 29418 | (843) 554-8602 |
| Gws Inc 5416 Rivers Ave, North Charleston 29406 | (843) 744-5881 |
| Jordan Jones Goulding Inc 3955 Faber Place Dr # 302, North Charleston 29405 | (843) 747-5889 |