| Business | Phone |
| Als 1901 E Layton Ave, Milwaukee 53235 | (414) 483-9721 |
| Asig 4792 S Howell Ave, Milwaukee 53207 | (414) 747-4584 |
| Cessna Citation Svc Ctr 210 E Citation Way, Milwaukee 53207 | (414) 744-1500 |
| Derco Aerospace Inc 8065 W Fairlane Ave, Milwaukee 53223 | (414) 355-7770 |
| Tracer Corp 1600 W Cornell St, Milwaukee 53209 | (414) 875-1234 |
| Tracer Repair & Overhaul 2040 W Cornell St, Milwaukee 53209 | (414) 875-0900 |
| Signature Flight Support 923 E Layton Ave, Milwaukee 53207 | (414) 747-5100 |
| Professional Aircraft Line Svc 201 Air Cargo Way, Milwaukee 53207 | (414) 747-1560 |