| Business | Phone |
| American Society Of Appraisers 555 Herndon Pkwy 125, Herndon 20170 | (703) 478-2228 |
| Contact Lens Society-America 441 Carlisle Dr, Herndon 20170 | (703) 437-5100 |
| Northern Virginia Tech Council 2214 Rock Hill Rd, Herndon 20170 | (703) 904-7532 |