| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| AMERICAN WELDING & GAS INC | 6944 S PULASKI RD | CHICAGO | IL | 60629 | (773) 582-0028 | (312) 896-1470 |
| ANGSTROM LLC | 4455 S KING DR, SUITE 101B | CHICAGO | IL | 60653 | (913) 972-6779 | (913) 972-6779 |
| ARCADIS | 200 S MICHIGAN AVE, STE 2000 | CHICAGO | IL | 60604 | (312) 917-1000 | (312) 917-1572 |
| ARCADIS US INC | 2800 W HIGGINS RD, STE 1000 | HOFFMAN ESTATES | IL | 60169 | (847) 805-1000 | (312) 917-1572 |
| ASCENDING LLC | 2751 PROSPERITY AVE, SUITE 240 | FAIRFAX | VA | 22031 | (518) 288-7586 | (703) 589-7930 |
| BIDNET | 20A RAILROAD AVE | ALBANY | NY | 12205 | (800) 677-1997 | (518) 438-0599 |
| BLACK & VEATCH CONSTRUCTION INC | 2 N RIVERSIDE PLAZA, STE 2050 | CHICAGO | IL | 60606 | (312) 346-3775 | (312) 346-4781 |
| BLACK & VEATCH CORPORATION | 180 N WACKER DR, STE 550 | CHICAGO | IL | 60606 | (312) 683-7850 | (312) 346-4781 |
| BROWN & CALDWELL ENGINEERING | 141 W JACKSON BLVD, STE #300A | CHICAGO | IL | 60604 | (708) 870-6168 | (312) 483-2101 |
| CONFLUENCY LLC | 5215 N RAVENSWOOD AVE, 305 | CHICAGO | IL | 60640 | (312) 860-6133 | (312) 860-6133 |
| CONSTRUCT CONNECT | 30 TECHNOLOGY PKWY S, STE 100 | NORCROSS | GA | 30092 | (800) 364-2059 | (866) 570-8187 |
| ECO2 | 3939 PRIORITY WAY W | INDIANAPOLIS | IN | 46240 | (317) 706-6484 | (317) 816-0940 |
| ENSARAS INC | 1206 WILSHIRE CT | CHAMPAIGN | IL | 61821 | (561) 294-0138 | (217) 607-2575 |
| ENVIROBIDNET.COM | 24123 PEACHLAND BLVD C-4 310 | PORT CHARLOTTE | FL | 33954 | (888) 888-0900 | |
| FUJITSU NORTH AMERICA | 1250 E ARGUES AVE | SUNNYVALE | CA | 94085 | (630) 466-1160 | (781) 272-5100 |
| IMS | 945 HORNBLEND ST | SAN DIEGO | CA | 92109 | (858) 490-8800 | (858) 490-8811 |
| INFRASTRUCTURE ENGINEERING INC | ONE SOUTH WACKER DR, STE 2650 | CHICAGO | IL | 60606 | (312) 425-9560 | (312) 425-9564 |
| INTERNATIONAL CONSULTING | 2187 ATLANTIC AVE | STAMFORD | CT | 06902 | (203) 517-3100 | (203) 517-3199 |
| IOSIGHT USA INC | 18851 NE 29TH AVE STE 1012 | AVENTURA | FL | 33180 | (954) 455-1221 | |
| IYKA ENTERPRISE INC | 2707 TURNBERRY RD | ST CHARLES | IL | 60104 | (630) 372-3900 | |
| JACOBS ENGINEERING GROUP INC | 525 WEST MONROE ST, STE 1600 | CHICAGO | IL | 60661 | (312) 251-3000 | |
| KALETECH LLC | 3831 MCCOY DR, #109 | AURORA | IL | 60504 | (630) 853-2533 | (630) 604-2344 |
| MATERIAL MATTERS INC | 820 N HANOVER ST | ELIZABETHTOWN | PA | 17022 | (717) 367-9697 | (717) 367-0367 |
| NRPGROUP INC | 9131 E 37TH ST NORTH | WICHITA | KS | 67226 | (316) 303-0505 | (315) 303-0515 |
| PRIME VENDOR INC | 4622 CEDAR AVE, BLDG 5, STE 123 | WILMINGTON | NC | 28403-6916 | (800) 746-9554 | (910) 726-1973 |
| PWXPRESS | 1900 COFFEEPORT RD | JACKSONVILLE | FL | 32208 | (408) 676-8941 | (408) 67608942 |
| SEVEN OUTSOURCE | 113 BARKSDALE PROFESSIONAL CTR | NEWARK | DE | 19711 | (315) 308-7852 | (315) 702-0205 |
| SMARTPROCURE INC | 700 W HILLSBORO BLVD, STE 4-100 | DEERFIELD BEACH | FL | 33441 | (888) 998-8675 | (954) 399-7067 |
| STANTEC | 532 W FIFTH AVE | NAPERVILLE | IL | 60563 | (608) 839-1998 | (608) 839-1995 |
| THE BID LAB | 247 W 46TH ST, N/A | NEW YORK | NY | 10036 | (832) 322-7205 | |
| WOODARD & CURRAN | 41 HUTCHINS DR | PORTLAND | ME | 04102 | (207) 558-3684 | (207) 774-6635 |