| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| 5150 INC D/B/A BERG-JOHNSON | 1000 WESTGATE DR, STE 151 | ST PAUL | MN | 55114 | (952) 941-5400 | (999) 999-9999 |
| A-1 ROOFING | 1425 CHASE AVE | ELK GROVE VILLAGE | IL | 60007 | (847) 952-3600 | (847) 952-3606 |
| A3 ENVIRONMENTAL LLC | 3030 WARRENVILLE RD, STE 418 | LISLE | IL | 60532 | (630) 507-9014 | (630) 507-9003 |
| AAA ENGINEERING LTD | 601 W JACKSON | CHICAGO | IL | 60661 | (312) 206-5501 | (312) 206-5501 |
| AACA | 514 E 95TH ST | CHICAGO | IL | 60619 | (312) 446-5984 | (999) 999-9999 |
| AADVANCED CHICAGO | 2000 CENTER | HOFFMAN ESTATES | IL | 60192 | (630) 294-1494 | (630) 294-1494 |
| ABB INDUSTRIAL SYSTEM | 16250 W GLENDALE DR | NEW BERLIN | WI | 53151 | (800) 752-0696 | (919) 666-1526 |
| AECOM TECHNICAL SERVICES INC. | 303 E WACKER DR, STE 1400 | CHICAGO | IL | 60601-5207 | (312) 373-7700 | (312) 373-6800 |
| AFFILIATED STEAM EQUIPMENT CO | 12424 S LOMBARD LN | ALSIP | IL | 60803 | (708) 371-0600 | (708) 371-0670 |
| AIRYS INC | 21825 CHERRY HILL ROAD | JOLIET | IL | 60433 | (708) 429-0660 | (708) 729-0795 |
| ALDRIDGE ELECTRIC INC | 844 E ROCKLAND RD | LIBERTYVILLE | IL | 60048 | (847) 247-5214 | (847) 680-5233 |
| ALLOY MECHANICAL INC | 17865 CHAPPEL | LANSING | IL | 60438 | (708) 251-8940 | (708) 251-8056 |
| AMERICAN SURVEYING & ENGINEERING PC | 120 N LASALLE ST, STE 3550 | CHICAGO | IL | 60602 | (312) 277-2000 | (312) 277-2002 |
| AMS MECHANICAL SYSTEMS INC | 9341 ADAM DON PKWY | WOODRIDGE | IL | 60517-8140 | (630) 887-7700 | (630) 887-0770 |
| AQUALITEC | 901 N FRANCISCO, APT 1F | CHICAGO | IL | 60622 | (312) 802-4572 | (312) 802-4572 |
| ARCADIS US INC | 2800 W HIGGINS RD, STE 1000 | HOFFMAN ESTATES | IL | 60169 | (847) 805-1000 | (312) 917-1572 |
| ARCO/MURRAY NATIONAL HOLDINGS INC | 3113 WOODCREEK DRIVE | DOWNERS GROVE | IL | 60515 | (331) 294-1870 | (999) 999-9999 |
| BAXTER & WOODMAN INC | 8430 W BRYN MAWR AVE, SUITE 400 | CHICAGO | IL | 60631 | (815) 459-1260 | (773) 444-0334 |
| 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 |
| BLACKRIDGE RESEARCH & CONSULTING | 4041 W HOLLOW CREEK DR | PEORIA | IL | 61615 | (917) 993-7467 | (917) 993-7467 |
| BLINDERMAN CONSTRUCTION CO INC | 224 N DESPLAINES STREET, STE 650 | CHICAGO | IL | 60661 | (773) 444-0500 | (312) 496-3047 |
| BROADWAY ELECTRIC INC | 500 W ALGONQUIN RD | MT. PROSPECT | IL | 60056 | (847) 593-0001 | (847) 593-0010 |
| BROWN & CALDWELL ENGINEERING | 141 W JACKSON BLVD, STE #300A | CHICAGO | IL | 60604 | (708) 870-6168 | (312) 483-2101 |
| BTL & ASSOC | 9606 WHARF ST | EDMONDS | WA | 98020 | (425) 775-8287 | (425) 775-8287 |
| BUILDERS AVENUE | 1452 E 52ND ST | CHICAGO | IL | 60615 | (708) 232-3919 | (708) 232-3919 |
| BURNS & MCDONNELL ENGINEERING | 200 W ADAMS, STE 2700 | CHICAGO | IL | 60606 | (816) 333-9400 | (630) 724-3201 |
| BUSH INFOTECH GROUP | 625 W ADAMS ST | CHICAGO | IL | 60661 | (331) 444-2211 | (331) 444-2211 |
| C CORONA CONSTRUCTION, LTD | 953 WILSHIRE DR | WHEELING | IL | 60090 | (224) 265-3019 | (999) 999-9999 |
| CENTRISYS CORP | 9586 58TH PL | KENOSHA | WI | 53144 | (262) 654-6006 | (262) 654-6063 |
| CJD STORMWATER SOLUTIONS | 2612 15TH AVE S | MINNEAPOLIS | MN | 55407 | (918) 605-5954 | (503) 214-8340 |
| CODY BUILDERS SUPPLY | 12002 N LAMAR | AUSTIN | TX | 78753 | (512) 339-9834 | (512) 339-0165 |
| CONSTRUCT CONNECT | 30 TECHNOLOGY PKWY S, STE 100 | NORCROSS | GA | 30092 | (800) 364-2059 | (866) 570-8187 |
| DAHME MECHANICAL INDUSTRIES INC | 610 S ARTHUR AVE | ARLINGTON HTS | IL | 60005 | (847) 253-0341 | (847) 253-9501 |
| DATABID | 433 PENN ST | NEWTOWN | PA | 18940 | (888) 929-3282 | (888) 929-9293 |
| DIAN INC | 14200 ASHFORD COURT | ORLAND PARK | IL | 60467 | (708) 364-0904 | (708) 364-0905 |
| DN TANKS | 11 TEAL RD | WAKEFIELD | MA | 01880 | (781) 246-1133 | (781) 224-5153 |
| DONOHUE & ASSOCIATES INC | 230 W MONROE ST, STE 2925 | CHICAGO | IL | 60606 | (312) 236-9147 | (999) 999-9999 |
| DRYDON EQUIPMENT, A DXP COMPANY | 2445 WESTFIELD DR, SUITE 100 | ELGIN | IL | 60124 | (630) 465-4909 | (224) 629-4061 |
| DUCO CEMENT CONSTRUCTION | 21649 S MONI DR | NEW LENOX | IL | 60541 | (630) 324-6219 | (630) 324-6219 |
| ENG SYSTEMS | 494 N DEARBORN ST | CHICAGO | IL | 60654 | (555) 670-4747 | (555) 670-4747 |
| ENVIRONMENTAL DESIGN INTERNATIONAL | 33 W MONROE ST, STE 1825 | CHICAGO | IL | 60603-5326 | (312) 345-8679 | (312) 345-0529 |
| EPLAN ONLINE PLANROOM | 1400 FORUM BLVD, STE 7B | COLUMBIA | IL | 65203 | (573) 447-7130 | (573) 355-5405 |
| F&G ROOFING COMPANY LLC | 7322 ARCHER RD | JUSTICE | IL | 60458 | (708) 597-5338 | (708) 462-4144 |
| FAIRFIELD SERVICE CO OF INDIANA LLC | 1401 KENTUCKY ST | MICHIGAN CITY | IN | 46360 | (219) 872-3000 | (219) 872-4237 |
| FH PASCHEN, SN NIELSEN & | 5515 N EAST RIVER RD | CHICAGO | IL | 60656-1113 | (773) 444-3474 | (773) 693-0064 |
| FLOTTWEG SEPARATION TECHNOLOGY INC | 10700 TOEBBEN DR | INDEPENDENCE | KY | 41051 | (859) 448-2300 | (859) 448-2333 |
| FLOW-TECHNICS INC | 181 ONTARIO ST | FRANKFORT | IL | 60423 | (815) 277-2600 | (815) 534-5311 |
| FORSGREN CONSTRUCTION CO LLC | 2335 SOUTH POINTE WAY | SAINT JOSEPH | MI | 49085 | (269) 281-7423 | (616) 453-4985 |
| FOUNDATION MECHANICS LLC | 8604 W CATALPA AVE, STE 907 | CHICAGO | IL | 60656 | (773) 234-3087 | (815) 301-3738 |
| FRANCIS CONSTRUCTION GROUP | 401 N MICHIGAN AVENUE, SUITE 1200 | CHICAGO | IL | 60611 | (312) 662-5620 | (999) 999-9999 |
| GARLAND/DBS INC | 3800 E 91ST ST | CLEVELAND | OH | 44105 | (216) 430-3513 | (216) 883-2055 |
| GASVODA & ASSOCIATES INC | 1530 HUNTINGTON DR | CALUMET CITY | IL | 60409 | (708) 891-4400 | (312) 894-1138 |
| GAYTON ENTERPRISES LLC | PO BOX 7277 | ALGONQUIN | IL | 60102 | (847) 857-8320 | (847) 594-6090 |
| GEO BANCROFT ENGINEERING LLC | 3300 DUNDEE RD | NORTHBROOK | IL | 60062-2303 | (847) 952-9362 | (999) 999-9999 |
| GEORGE SOLLITT CONSTRUCTION | 185 HANSEN COURT | WOOD DALE | IL | 60191 | (630) 860-7333 | (630) 860-7347 |
| GRAYBAR | ONE PIERCE PL | ITASCA | IL | 60143 | (630) 671-6137 | (999) 999-9999 |
| GRIFFIN DEWATERING | 3450 CALUMET AVE | HAMMOND | IN | 46320 | (219) 931-1662 | (219) 931-7877 |
| GSG CONSULTANTS INC | 623 COOPER CT | SCHAUMBURG | IL | 60173 | (312) 733-6262 | (312) 733-5612 |
| GWV ENGINEERS INC | 207 E OHIO ST, #303 | CHICAGO | IL | 60611 | (312) 507-9647 | (999) 999-9999 |
| HARRINGTON INDUSTRIAL PLASTICS LLC | 1020 DAVEY RD, STE 700 | WOODRIDGE | IL | 60517 | (630) 972-5570 | (630) 972-5571 |
| IHC CONSTRUCTION CO LLC | 385 AIRPORT RD, STE 100 | ELGIN | IL | 60123 | (847) 742-1516 | (847) 742-6610 |
| INDEPENDENT MECHANICAL | 2671 UNITED LN | ELK GROVE VILLAGE | IL | 60007 | (773) 243-0575 | (773) 496-8136 |
| INNLEADAIR LLC | 3501 ALGONQUIN RD, STE 850 | ROLLING MEADOWS | IL | 60008-3162 | (847) 534-8452 | (847) 258-9965 |
| INTEGRATED ENVIRONMENTAL | 1333 BURR RIDGE PKWY, SUITE 200 | BURR RIDGE | IL | 60527 | (708) 926-9588 | (708) 926-9251 |
| JACOBS ENGINEERING GROUP INC | 525 WEST MONROE ST, STE 1600 | CHICAGO | IL | 60661 | (312) 251-3000 | (999) 999-9999 |
| JBJBUSINESSGROUP INC | 16 W VAN BUREN ST | JOLIET | IL | 60544 | (815) 641-7434 | (815) 641-7434 |
| JEWEL ENTERPRISES LLC | 1755 E 55TH ST, APT 904 | CHICAGO | IL | 60615 | (847) 222-3646 | (999) 999-9999 |
| JOHN BURNS CONSTRUCTION COMPANY LLC | 999 OAKMONT PLAZA DR, SUITE 400 | WESTMONT | IL | 60559 | (708) 326-3500 | (000) 000-0000 |
| JOSEPH J. HENDERSON & SON | 4288 OLD GRAND AVE | GURNEE | IL | 60031 | (847) 244-3222 | (847) 244-9572 |
| JUDLAU CONTRACTING INC | 1011 WARRENVILLE RD, STE 475 | LISLE | IL | 60532 | (718) 554-2320 | (331) 777-5771 |
| JUNEAU ASSOCIATES INC PC | 1111 BURLINGTON AVE, STE 100 | LISLE | IL | 60532 | (618) 877-1400 | (618) 659-0941 |
| K + P ADVISORY LLC | 811 S LYTLE ST | CHICAGO | IL | 60607 | (847) 323-8708 | (999) 999-9999 |
| KALETECH LLC | 3831 MCCOY DR, #109 | AURORA | IL | 60504 | (630) 853-2533 | (630) 604-2344 |
| KALWALL CORPORATION | 1111 CANDIA RD | MANCHESTER | NH | 03109 | (800) 258-9777 | (603) 627-7905 |
| KENNY CONSTRUCTION COMPANY | 2215 SANDERS RD, STE 400 | NORTHBROOK | IL | 60062 | (847) 309-1191 | (847) 272-5930 |
| KEO ILLINOIS LLC | 1250 SOUTH GROVE AVE, SUITE #300 | BARRINGTON | IL | 60010 | (773) 340-1466 | (313) 340-1680 |
| KIEWIT INFRASTRUCTURE CO | TWO PIERCE PL, STE 1600 | ITASCA | IL | 60143 | (773) 458-1250 | (999) 999-9999 |
| KNICKERBOCKER ROOFING & PAVING | 16851 S LATHROP AVE | HARVEY | IL | 60426 | (708) 339-7260 | (708) 339-3806 |
| L MARSHALL INC | 2100 LEHIGH RD | GLENVIEW | IL | 60026 | (847) 724-5400 | (847) 724-7306 |
| MACKAY | 300 S WACKER DR, STE 2880 | CHICAGO | IL | 60606 | (847) 239-4512 | (847) 239-4512 |
| MAMAN CORP | 1055 ARTHUR AVE | ELK GROVE VILLAGE | IL | 60007 | (847) 812-1745 | (847) 358-2682 |
| MEADE ELECTRIC CO | 625 WILLOWBROOK CENTER PKWY | WILLOWBROOK | IL | 60527-7969 | (708) 588-2500 | (708) 588-2501 |
| MICHELS CONSTRUCTION INC | 817 MAIN STREET | BROWNSVILLE | WI | 53006 | (630) 800-1547 | (630) 701-2907 |
| MORTENSON CONSTRUCTION | 25 NORTHWEST POINT BLVD #100 | ELK GROVE VILLAGE | IL | 60007 | (847) 472-8158 | (847) 981-8667 |
| NELSON SASH SYSTEMS INC | 4650 W 120TH ST | ALSIP | IL | 60803 | (708) 670-6756 | (708) 371-2261 |
| NOVASPECT INC | 1124 TOWER RD | SCHAUMBURG | IL | 60173 | (708) 362-0285 | (847) 885-8200 |
| PASCHEN CONCRETE | 8623 W BRYN MAWR | CHICAGO | IL | 60631 | (773) 850-9468 | (000) 000-0000 |
| PATH CONSTRUCTION COMPANY INC | 125 E ALGONQUIN RD | ARLINGTON HEIGHTS | IL | 60005 | (847) 398-7100 | (847) 398-7101 |
| PETERSON AND MATZ, INC. | 757 S 8TH ST | WEST DUNDEE | IL | 60118 | (847) 844-4405 | (847) 844-4409 |
| POWERS & SONS CONSTRUCTION CO | 2636 W 15TH AVE | GARY | IN | 46404-2195 | (219) 949-3100 | (219) 949-5906 |
| PRIME VENDOR INC | 4622 CEDAR AVE, BLDG 5, STE 123 | WILMINGTON | NC | 28403-6916 | (800) 746-9554 | (910) 726-1973 |
| PROCESS ENERGY LLC | 191 RIVERSIDE DR | WATERFORD | WI | 53185 | (262) 226-1971 | (999) 999-9999 |
| PUMPING SOLUTIONS INC | 2850 W 139TH ST | BLUE ISLAND | IL | 60406 | (708) 272-1850 | (708) 272-1825 |
| QUALITY TRUCK & TRAILER REPAIR | 4140 S OAKLEY AVE | CHICAGO | IL | 60609 | (630) 774-0296 | (773) 254-9250 |
| RAMIREZ GROUP LLC | 3630 RANDOLPH ST | LANSING | IL | 60438 | (219) 798-7185 | (222) 222-2222 |
| REYES GROUP LTD | 15515 S CRAWFORD AVE | MARKHAM | IL | 60428 | (708) 596-7100 | (708) 596-7184 |
| RUBINOS & MESIA ENGINEERS INC | 200 S MICHIGAN AVE, STE 1500 | CHICAGO | IL | 60604 | (312) 663-5879 | (312) 870-6636 |
| SAF-T-GARD INTL | 205 HUEHL RD | NORTHBROOK | IL | 60062 | (847) 291-160... | (847) 291-1610 |
| SATELLITE SHELTERS INC | 2530 XENIUM LN N | MINNEAPOLIS | MN | 55441 | (800) 453-1299 | (763) 420-2034 |
| SCHNEIDER ELECTRIC SYSTEMS USA INC | 70 MECHANIC ST | FOXBORO | MA | 02035 | (281) 787-8983 | (949) 639-1508 |
| SHAWN BROWN ENTERPRISES INC, D/B/A | 1401 E 79TH ST | CHICAGO | IL | 60619 | (773) 221-7221 | (773) 221-7272 |
| SIEMENS INDUSTRY INC | 1701 GOLF ROAD, STE 3-500 | ROLLING MEADOWS | IL | 60008 | (847) 803-2700 | (847) 803-2733 |
| SMARTPROCURE INC | 700 W HILLSBORO BLVD, STE 4-100 | DEERFIELD BEACH | FL | 33441 | (888) 998-8675 | (954) 399-7067 |
| SULLWOOD INC | 1240 N HOLMAN AVE | CHICAGO | IL | 60651 | (312) 810-8757 | (999) 999-9999 |
| SUNRISE ELECTRIC SUPPLY INC | 130 S ADDISON RD | ADDISION | IL | 60101 | (630) 543-1111 | (630) 543-1678 |
| T Y LIN INTL GREAT LAKES INC | 200 S WACKER DR, STE 1400 | CHICAGO | IL | 60606 | (317) 473-6234 | (999) 999-9999 |
| THATCHER FOUNDATIONS INC | 7100 INDUSTRIAL HWY | GARY | IN | 46406 | (773) 721-9797 | (773) 721-1011 |
| TREMCO INC | 2638 N HARTLAND CT | CHICAGO | IL | 60614 | (773) 640-6254 | (773) 935-9576 |
| USA-FORM INC | 3N775 POWIS RD | WEST CHICAGO | IL | 60185 | (630) 513-6046 | (999) 999-9999 |
| V3 COMPANIES LTD, D/B/A V3 WETLAND | 7325 JANES AVE | WOODRIDGE | IL | 60517 | (630) 724-9200 | (630) 724-9202 |
| VALOR CONSTRUCTION SERVICES INC | 16725 RICHMOND AVE, UNIT 6 | HAZEL CREST | IL | 60429 | (219) 306-2558 | (999) 999-9999 |
| VICTAULIC | 4901 KESSLERSVILLE RD | EASTON | PA | 18040 | (616) 450-6358 | (999) 999-9999 |
| W. E. ONEIL CONSTRUCTION CO | 1245 W WASHINGTON BLVD | CHICAGO | IL | 60607 | (773) 755-1611 | (773) 584-0866 |
| WALSH CONSTRUCTION CO II LLC | 929 W ADAMS ST | CHICAGO | IL | 60607 | (312) 563-5400 | (312) 563-5466 |
| WILLIAM CHARLES, A MASTEC COMPANY | 833 FEATHERSTONE RD | ROCKFORD | IL | 61107 | (815) 654-4700 | (815) 654-4700 |
| WILLIAM T CONNELLY INC | 40 S ADDISON RD, SUITE 100 | ADDISON | IL | 60101 | (630) 543-9059 | (630) 543-9077 |
| WINDY CITY REPRESENTATIVES LLC | 200 WINDSOR DRIVE | OAK BROOK | IL | 60523 | (630) 590-6933 | (630) 571-4110 |
| WOMEN'S BUSINESS DEV CENTER | 8 S MICHIGAN AVE, STE 400 | CHICAGO | IL | 60603 | (312) 853-3477 | (312) 853-0145 |
| ZANN, INC | 7752 E 4TH AVE, STE 1C | DENVER | CO | 80230 | (872) 228-5272 | (872) 228-5272 |