| Business | Phone |
| Advanced Technologies & Labs 8146 Beechcraft Ave, Gaithersburg 20879 | (301) 947-4455 |
| Urs Corp 200 Orchard Ridge Dr # 101, Gaithersburg 20878 | (301) 258-9780 |
| Integrated Environmental 8 Brookes Ave, Gaithersburg 20877 | (240) 631-8990 |
| Legin Group Inc 901 Russell Ave # 450, Gaithersburg 20879 | (301) 590-0303 |