| Business | Phone |
| Endesco Inc 15 Rolling Green Ct, North Potomac 20878 | (301) 294-7066 |
| Engineering Design Dev Ctr 12317 Turley Dr, North Potomac 20878 | (301) 869-4219 |
| Gandhi Engineers & Assoc Inc 14405 Lake Winds Way, North Potomac 20878 | (301) 948-1865 |
| Hypertek Inc 14624 Country Creek Ln, North Potomac 20878 | (301) 315-9101 |
| Isys Consulting Inc 11901 Riding Loop Ter, North Potomac 20878 | (301) 217-0838 |