| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| AAA ENGINEERING LTD | 4323 W IRVING PARK RD, STE 200 | CHICAGO | IL | 60641 | (773) 657-3300 | (773) 657-3330 |
| AMERICAN SURVEYING & ENGINEERING PC | 120 N LASALLE ST, STE 3550 | CHICAGO | IL | 60602 | (312) 277-2000 | (312) 277-2002 |
| ARCADIS US INC | 2800 W HIGGINS RD, STE 1000 | HOFFMAN ESTATES | IL | 60169 | (847) 805-1000 | (312) 917-1572 |
| ASI MARINE LP | 40 CENTRE DRIVE, STE 3 | ORCHARD PARK | NY | 14127 | 905-321-4689 | 905-643-1816 |
| BALLARD MARINE CONSTRUCTION INC | 727 S 27TH ST | WASHOUGAL | WA | 98671 | (360) 695-5163 | (360) 954-5539 |
| BIDNET | 20A RAILROAD AVE | ALBANY | NY | 12205 | (800) 677-1997 | (518) 438-0599 |
| BLACK & VEATCH CORPORATION | 180 N WACKER DR, STE 550 | CHICAGO | IL | 60606 | (312) 683-7850 | (312) 346-4781 |
| BRIERLEY ASSOCIATES CORPORATION | 6323 FLY RD, SUITE 4 | EAST SYRACUSE | NY | 13057 | (315) 434-8885 | (315) 434-8896 |
| BURNS & MCDONNELL ENGINEERING | 200 W ADAMS, STE 2700 | CHICAGO | IL | 60606 | (816) 333-9400 | (630) 724-3201 |
| CJD STORMWATER SOLUTIONS | 2612 15TH AVE S | MINNEAPOLIS | MN | 55407 | (918) 605-5954 | (503) 214-8340 |
| COLLINS ENGINEERS INC | 550 W JACKSON BLVD, SUITE 1200 | CHICAGO | IL | 60661 | (312) 236-7003 | (999) 999-9999 |
| CRAWFORD MURPHY & TILLY INC (CMT) | 125 S WACKER DR, STE 2880 | CHICAGO | IL | 60606 | (312) 855-2540 | (999) 999-9999 |
| CUES/PIPC | 100 VILLANI DR | BRIDGEVILLE | PA | 15017-3461 | (412) 916-9680 | (412) 916-9680 |
| ENVIROBIDNET.COM | 24123 PEACHLAND BLVD C-4 310 | PORT CHARLOTTE | FL | 33954 | (888) 888-0900 | 999-999-9999 |
| EPLAN ONLINE PLANROOM | 1400 FORUM BLVD, STE 7B | COLUMBIA | IL | 65203 | (573) 447-7130 | (573) 355-5405 |
| EXP US SERVICES INC | 205 N MICHIGAN AVE, STE 3600 | CHICAGO | IL | 60601 | (312) 616-0000 | (312) 616-6069 |
| FORSGREN CONSTRUCTION CO LLC | 3195 DEER RUN PVT | MARNE | MI | 49345 | (616) 677-6069 | (616) 677-6069 |
| GEI CONSULTANTS INC | 120 W MADISON ST, STE 1305 | CHICAGO | IL | 60602 | (312) 985-0371 | (312) 278-0262 |
| HIBBARD INSHORE | 2285 N OPDYKE RD, STE A | AUBURN HILLS | MI | 48326 | (248) 745-8456 | (248) 745-4958 |
| JACOBS ASSOCIATES, D/B/A DELVE | 123 N WACKER DR, STE 675 | CHICAGO | IL | 60606 | (312) 535-0283 | (999) 999-9999 |
| JACOBS ENGINEERING GROUP INC | 525 WEST MONROE ST, STE 1600 | CHICAGO | IL | 60661 | (312) 251-3000 | (999) 999-9999 |
| KALETECH LLC | 3831 MCCOY DR, #109 | AURORA | IL | 60504 | (630) 853-2533 | (630) 604-2344 |
| KIMLEY-HORN AND ASSOCIATES INC | PO BOX 856408 | MINNEAPOLIS | MN | 55485-6408 | (630) 487-3441 | (999) 999-9999 |
| LEGAL VIDEO SERVICES INC | 609 E LAKE SHORE DR | TOWER LAKES | IL | 60010 | (312) 551-0595 | (312) 551-0596 |
| NORTH AMERICA PROCUREMENT COUNCIL | P O BOX 40445 | GRAND JUNCTION | CO | 81504 | (302) 450-1923 | (302) 450-1925 |
| NOVASPECT INC | 1124 TOWER RD | SCHAUMBURG | IL | 60173 | (708) 362-0285 | (847) 885-8200 |
| ORION ENGINEERS LLC | 312 N MAY ST, STE 100 | CHICAGO | IL | 60607 | (312) 544-9108 | (999) 999-9999 |
| PRIMERA ENGINEERS LTD | 550 W JACKSON BLVD, STE 600 | CHICAGO | IL | 60661 | (312) 606-0910 | (312) 606-0415 |
| PROCON CONSULTING LLC | 1800 TYSONS BLVD, SUITE 620 | MCLEAN | VA | 22102 | (703) 527-7059 | (703) 852-2733 |
| RAVAN AIR | 12077 EDWARD ST | CONNEAUT LAKE | PA | 16316 | (814) 853-5127 | (000) 000-0000 |
| REDZONE ROBOTICS INC | 195 THORN HILL RD, STE 110 | WARRENDALE | PA | 15086-5502 | (412) 927-0140 | (412) 476-8981 |
| RJN GROUP INC | 2655 WARRENVILLE RD, SUITE 225 | DOWNERS GROVE | IL | 60515 | (630) 682-4700 | (630) 682-4754 |
| ROBINSON ENGINEERING LTD | 17000 SOUTH PARK AVE | SOUTH HOLLAND | IL | 60473 | (708) 331-6700 | (708) 331-3826 |
| SDI ENGINEERING CORP | 309 W WASHINGTON ST, STE 430 | CHICAGO | IL | 60606 | (312) 551-9780 | (312) 551-9781 |
| SIMPSON GUMPERTZ & HEGER INC | 135 S LASALLE ST, 38TH FL | CHICAGO | IL | 60625 | (312) 754-7466 | (312) 754-7501 |
| SMARTPROCURE INC | 700 W HILLSBORO BLVD, STE 4-100 | DEERFIELD BEACH | FL | 33441 | (888) 998-8675 | (954) 399-7067 |
| STANTEC CONSULTING SERVICES INC | 6605 W STEGER RD | MONEE | IL | 60449 | (708) 627-8018 | (999) 999-9999 |
| T Y LIN INTL GREAT LAKES INC | 200 S WACKER DR, STE 1400 | CHICAGO | IL | 60606 | (317) 473-6234 | (999) 999-9999 |
| TERRA ENGINEERING LTD | 225 W OHIO ST, STE 400 | CHICAGO | IL | 60654-7851 | (312) 467-0123 | (312) 467-0220 |
| TREKK DESIGN GROUP LLC | 1310 E 104TH ST. SUITE 200 | KANSAS CITY | MO | 64131 | (816) 877-8687 | (816) 874-4675 |
| WALSH CONSTRUCTION CO II LLC | 929 W ADAMS ST | CHICAGO | IL | 60607 | (312) 563-5400 | (312) 563-5466 |