| Business | Phone |
| Vela Associates 3602 Kenilworth Dr, Chevy Chase 20815 | (301) 657-2926 |
| Weinroth Associates Inc 4701 Willard Ave, Chevy Chase 20815 | (301) 657-9709 |
| Technology Consulting Group 5513 Montgomery St, Chevy Chase 20815 | (301) 913-9325 |
| Schwartz Engineering Inc 4600 N Park Ave, Chevy Chase 20815 | (301) 215-7740 |
| Danwalt Research & Design Inc 3608 Underwood St, Chevy Chase 20815 | (301) 986-1332 |
| Engineering Connection Inc 4117 Jones Bridge Rd, Chevy Chase 20815 | (301) 657-3669 |
| Everest Trails Intl Inc 5914 Wisconsin Ave, Chevy Chase 20815 | (301) 654-0312 |