| Business | Phone |
| Emr Inc 11 E Superior St # 541, Duluth 55802 | (218) 625-2332 |
| Gme Consultants Inc 360 Garfield Ave, Duluth 55802 | (218) 722-4323 |
| Service Engineering Group 215 N Central Ave, Duluth 55807 | (218) 727-8186 |
| Wenck Associates Inc 31 W Superior St # 301, Duluth 55802 | (218) 727-2021 |