| Business | Phone |
| Arm Group Inc 5950 Symphony Woods Rd, Columbia 21044 | (410) 740-0840 |
| Axiom Technology Corp 5525 Twin Knolls Rd # 325, Columbia 21045 | (410) 740-7150 |
| Baham Corp 5501 Twin Knolls Rd, Columbia 21045 | (410) 730-0800 |
| Bdm Corp 8305 Guilford Rd, Columbia 21046 | (410) 964-6500 |
| Bith Group Inc 9151 Rumsey Rd # 150, Columbia 21045 | (410) 730-0077 |
| Christopher Consultants Ltd 7172 Columbia Gateway Dr # 100, Columbia 21046 | (410) 872-8690 |
| Clark Finefrock & Sackett 7135 Minstrel Way # 201, Columbia 21045 | (410) 381-7500 |
| Combustion Science 8940 State Route 108 # L, Columbia 21045 | (410) 884-3262 |
| Construction Dynamics Group 9861 Brokenland Pkwy # 254, Columbia 21046 | (410) 381-1990 |
| Construction Technology Labs 5565 Sterrett Pl # 312, Columbia 21044 | (410) 997-0400 |
| Emec 9151 Rumsey Rd # 170, Columbia 21045 | (410) 715-1900 |
| Energetics Inc 7164 Columbia Gateway Dr, Columbia 21046 | (410) 290-0370 |
| Enterprise Information Sltns 9891 Brokenland Pkwy # 300, Columbia 21046 | (410) 381-7898 |
| Ets Solutions 8630 Guilford Rd # M Pmb 282, Columbia 21046 | (301) 362-3111 |
| Evi Inc 7065 Columbia Gateway Dr, Columbia 21046 | (410) 290-1919 |
| Facility Dynamics Engineering 6760 Alexander Bell Dr # 220, Columbia 21046 | (410) 290-0900 |
| Forte Development Corp 6218 Sebring Dr, Columbia 21044 | (301) 596-4300 |
| Fossil Consulting Svc 7130 Minstrel Way # 230, Columbia 21045 | (410) 312-6240 |
| General Physics Corp 10025 Governor Warfield Pkwy, Columbia 21044 | (410) 910-2000 |
| Geosyntec Consultants Inc 10015 Old Columbia Rd # A200, Columbia 21046 | (410) 381-4333 |
| Hntb Corp 9175 Guilford Rd # 100, Columbia 21046 | (410) 792-4360 |
| Iks Assoc Inc 10632 Little Patuxent Pkwy, Columbia 21044 | (443) 535-0321 |
| Paratek Microwave Inc 6935 Oakland Mills Rd, Columbia 21045 | (443) 259-0140 |
| Paulco Engineering Inc 8775 Cloudleap Ct, Columbia 21045 | (410) 772-0645 |
| Progressive Engineering Cnslt 9160 Red Branch Rd # E9, Columbia 21045 | (410) 715-0390 |
| Rba Group 7164 Columbia Gateway Dr # 205, Columbia 21046 | (410) 312-0966 |
| Riemer Muegge & Assoc 8818 Centre Park Dr # 200, Columbia 21045 | (410) 997-8900 |
| Schoen Engineering Columbia 21044 | (410) 730-9797 |
| Select Energy Services Inc 5565 Sterrett Pl # 400, Columbia 21044 | (410) 730-0663 |
| Sigtek 9075 Guilford Rd # C1, Columbia 21046 | (410) 290-3918 |
| Sinnar Associates 6111 Triangle Dr, Columbia 21044 | (301) 596-6406 |
| Water Resources Management Inc 6310 Stevens Forest Rd, Columbia 21046 | (410) 381-1181 |