| Business | Phone |
| Wilsey & Assoc 3500 S Phillips Ave # 201, Sioux Falls 57105 | (605) 336-1676 |
| West Plains Engineering Inc 4609 S Techlink Cir, Sioux Falls 57106 | (605) 362-3753 |
| Banner Associates Inc 2307 W 57th St, Sioux Falls 57108 | (605) 977-6342 |
| Ulteig Engineers 4808 S Technopolis Dr, Sioux Falls 57106 | (605) 323-2306 |
| T A Lathrop Assoc 912 N Minnesota Ave, Sioux Falls 57104 | (605) 332-4395 |
| Seh Inc 401 E 8th St # 309, Sioux Falls 57103 | (605) 330-7000 |
| Dakota Academic Consulting Inc 4608 S Woodwind Ln, Sioux Falls 57103 | (605) 977-4648 |
| Schmidt Engineering Inc 401 E 8th St, Sioux Falls 57103 | (605) 336-3087 |
| Dewild Grant Reckert & Assoc 1109 E 14th St, Sioux Falls 57104 | (605) 339-4157 |
| Foy Engineering & Energy 828 N Menlo Ave, Sioux Falls 57104 | (605) 338-5483 |
| Optima Engineering 3220 W 57th St, Sioux Falls 57108 | (605) 332-0031 |
| Goldsmith & Heck Engineers 400 S Sycamore Ave # 105-2, Sioux Falls 57110 | (605) 332-9685 |
| Hdr Engineering Inc 600 S Cliff Ave # 106, Sioux Falls 57104 | (605) 338-2660 |
| Howard R Green Co 309 W 43rd St # 101, Sioux Falls 57105 | (605) 334-4499 |
| Marshall Engineering Inc 6400 N Cliff Ave, Sioux Falls 57104 | (605) 940-0343 |
| Jsa Consulting Engineers Inc 3700 S West Ave, Sioux Falls 57105 | (605) 367-1036 |