| Business | Phone |
| Hembree Enterprises Inc 16311 Oxford Ct, Bowie 20715 | (301) 262-6735 |
| J & Z Engineering Inc 4234 Glenn Dale Rd, Bowie 20720 | (301) 262-9334 |
| Norm Cooper Assoc 16007 Pointer Ridge Dr, Bowie 20716 | (301) 249-2667 |
| Contractors Engineering Svc 13707 Heatherstone Dr, Bowie 20720 | (301) 464-1955 |
| Edg Inc 1747 Albert Dr, Bowie 20721 | (301) 390-3662 |
| Engineering Contractors Inc Bowie 20715 | (301) 805-0743 |
| Waterman Engineering & Cnsltng Bowie 20716 | (301) 249-4995 |
| Worldwide Aviation Logistical 3643 Elder Oaks Blvd, Bowie 20716 | (301) 809-9100 |
| Z Systems Corp 11608 Silvergate Ln, Bowie 20720 | (301) 805-1920 |
| H B Consulting 10011 Erion Ct, Bowie 20721 | (301) 352-9179 |