| Business | Phone |
| Penn Tex Aerospace Inc 823 Congress Ave, Austin 78701 | (512) 708-1717 |
| Northrop Gruman Information 4000 S I H 35, Austin 78704 | (512) 804-2153 |
| Northrop Grumman Corp 7745 Chevy Chase Dr, Austin 78752 | (512) 442-2991 |
| Bae Systems 6500 Tracor Ln, Austin 78725 | (512) 926-2800 |