| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| AECOM TECHNICAL SERVICES INC. | 303 E WACKER DR, STE 1400 | CHICAGO | IL | 60601-5207 | (312) 373-7700 | (312) 373-6800 |
| B&W CONTROL SYSTEMS INTEGRATION | 8678 RIDGEFIELD RD | CRYSTAL LAKE | IL | 60012 | (815) 459-1260 | (815) 455-0450 |
| BIDNET | 15 BRITISH AMERICAN BLVD | LATHAM | NY | 12110 | (518) 438-009... | (518) 689-7038 |
| BLACK & VEATCH CORPORATION | 180 N WACKER DR, STE 550 | CHICAGO | IL | 60606 | (312) 683-7850 | (312) 346-4781 |
| BROWN & CALDWELL | 141 W JACKSON BLVD, STE 300A | CHICAGO | IL | 60604 | (708) 870-6168 | (312) 483-2101 |
| CARLSON ENVIRONMENTAL INC | 65 E WACKER PL, STE 2210 | CHICAGO | IL | 60601-7253 | (312) 346-2140 | (312) 346-6956 |
| CDM SMITH INC | 125 S WACKER DR, STE 700 | CHICAGO | IL | 60606 | (312) 346-5000 | (312) 346-5228 |
| CERTIFIED E M LLC | 75A LAKE RD, #184 | CONGERS | NY | 10920 | (914) 584-7590 | (845) 290-1822 |
| CONSTRUCT CONNECT | 30 TECHNOLOGY PKWY S, STE 100 | NORCROSS | GA | 30092 | (800) 364-2059 | (866) 570-8187 |
| DATABID | 433 PENN ST | NEWTOWN | PA | 18940 | (888) 929-3282 | (888) 929-9293 |
| DELTA INSTITUTE | 35 E WACKER DRIVE, STE 1200 | CHICAGO | IL | 60601 | (312) 377-7700 | (312) 268-6294 |
| DUPAGE RIVER SALT CREEK WORKGROUP | 10 S 404 KNOCH KNOLLS RD | NAPERVILLE | IL | 60565 | (630) 768-7427 | (630) 428-4599 |
| ENVIROBIDNET.COM | 24123 PEACHLAND BLVD C-4 310 | PORT CHARLOTTE | FL | 33954 | (888) 888-0900 | 999-999-9999 |
| ENVIRONMENTAL MONITORING AND | 509 N 3RD AVE | DES PLAINES | IL | 60016 | (847) 324-3304 | (847) 967-6735 |
| F LEE SIMMONS | 1424 GREENLEAF ST, UNIT A | EVANSTON | IL | 60202 | (630) 288-1490 | (630) 288-1490 |
| GEI CONSULTANTS INC | 120 W MADISON ST, STE 1305 | CHICAGO | IL | 60602 | (312) 985-0371 | (312) 278-0262 |
| GEOSYNTEC CONSULTANTS INC | 134 N LASALLE ST, STE 300 | CHICAGO | IL | 60602 | (312) 658-0500 | (866) 783-5766 |
| GREEN METRO PLANNING, LLC | 673 CLARENDON LN | AURORA | IL | 60504 | (630) 551-8156 | |
| GREENLEAF ADVISORS LLC | 227 GREENLEAF AVE | WILMETTE | IL | 60091 | (312) 953-2114 | |
| HORNER & SHIFRIN INC | 8755 W HIGGINS RD, STE 325 | CHICAGO | IL | 60631 | (312) 332-4334 | (844) 339-2910 |
| HUFF & HUFF INC | 915 HARGER ROAD | OAK BROOK | IL | 60523 | (630) 684-9100 | (999) 999-9999 |
| IMS | 945 HORNBLEND ST | SAN DIEGO | CA | 92109 | (858) 490-8800 | (858) 490-8811 |
| INTERRA INC | 600 TERRITORIAL DR, STE G | BOLINGBROOK | IL | 60440 | (630) 754-8700 | (630) 754-8705 |
| IYKA ENTERPRISE INC | 2707 TURNBERRY RD | ST CHARLES | IL | 60104 | (630) 372-3900 | (999) 999-9999 |
| JACOBS ENGINEERING | 525 W MONROE ST, STE 1600 | CHICAGO | IL | 60661 | (312) 251-3000 | (678) 579-8038 |
| JPNGOY LLC, DBA AGANO ZURI | 1416 N GREEN MEADOWS BLVD | STREAMWOOD | IL | 60107 | (847) 875-8860 | |
| KABBES ENGINEERING INC | 1250 S GROVE AVE, STE 200 | BARRINGTON | IL | 60010 | (847) 842-9663 | |
| KALETECH LLC | 3831 MCCOY DR, #109 | AURORA | IL | 60504 | (630) 853-2533 | (630) 604-2344 |
| KALTSOUNI MEHDI INC | 223 W JACKSON BLVD, STE 1010 | CHICAGO | IL | 60606 | (312) 987-9800 | (312) 987-9892 |
| LIMNO-TECH INC | 501 AVIS DR | ANN ARBOR | MI | 48108 | (734) 332-1200 | (734) 332-1212 |
| MCBRIDE ENGINEERING INC | 1820 RIDGE RD, STE 202 | HOMEWOOD | IL | 60430 | (708) 799-1350 | (708) 799-9599 |
| MELCHING WATER SOLUTIONS LLC | 4030 W EDGERTON AVE | GREENFIELD | WI | 53221-3020 | (414) 368-7018 | |
| MOTT MACDONALD LLC | 10 S LASALLE ST, STE 2520 | CHICAGO | IL | 60603 | (312) 894-5372 | (312) 858-9700 |
| NORTH AMERICA PROCUREMENT COUNCIL | P O BOX 40445 | GRAND JUNCTION | CO | 81504 | (302) 450-1923 | (302) 450-1925 |
| PRIME VENDOR INC | 4622 CEDAR AVE, BLDG 5, STE 123 | WILMINGTON | NC | 28403-6916 | (800) 746-9554 | (910) 726-1973 |
| RAMBOLL US CONSULTING | 333 W WACKER DR, SUITE 2700 | CHICAGO | IL | 60606 | (312) 288-3800 | (312) 288-3801 |
| SEECO CONSULTANTS INC | 7350 DUVAN DR | TINLEY PARK | IL | 60477 | (708) 429-1666 | (708) 429-1689 |
| SEVEN OUTSOURCE | 113 BARKSDALE PROFESSIONAL CTR | NEWARK | DE | 19711 | (315) 308-7852 | (315) 702-0205 |
| SPAAN TECH INC | 311 S WACKER DR, STE 2400 | CHICAGO | IL | 60606 | (312) 277-8800 | (999) 999-9999 |
| STANTEC CONSULTING SERVICES INC | 6605 W STEGER RD | MONEE | IL | 60449 | (708) 627-8018 | (999) 999-9999 |
| TECHLAW | 55 W MONROE, STE 3450 | CHICAGO | IL | 60603 | (312) 345-8966 | (312) 345-8979 |
| UNIV OF IL | 205 N MATTHEWS AVE | URBANA | IL | 61801 | (217) 333-8038 | (217) 333-9464 |
| V3 COMPANIES LTD, D/B/A V3 WETLAND | 7325 JANES AVE | WOODRIDGE | IL | 60517 | (630) 724-9200 | (630) 724-9202 |
| WETLANDS RESEARCH INC | PO BOX 225 | WADSWORTH | IL | 60083 | (847) 244-8133 | (312) 922-1823 |