| Business | Phone |
| Achates Systems Inc 11724 Le Havre Dr, Potomac 20854 | (301) 340-9171 |
| Forward Design 11825 Falls Rd, Potomac 20854 | (301) 294-8544 |
| Marcus Corp 10108 Ormond Rd, Potomac 20854 | (301) 983-0092 |
| Kane Construction Inc 10709 Tara Rd, Potomac 20854 | (301) 299-6808 |