| Business | Phone |
| Westin Engineering 221 N La Salle St, Chicago 60601 | (312) 372-3405 |
| American Science & Tech Corp 1324 W Grand Ave, Chicago 60622 | (312) 433-3800 |
| Apex Consulting Engineers Llc 20 N Wacker Dr 2507, Chicago 60606 | (312) 977-0660 |
| Building Envelope Consultants 8700 W Bryn Mawr Ave, Chicago 60631 | (773) 714-2823 |
| Bloom Consultants Llc 600 W Fulton St, Chicago 60661 | (312) 876-9500 |
| Burns & Mc Donnell 820 W Jackson Blvd, Chicago 60607 | (312) 454-0674 |
| Burns Mc Donnell 300 W Adams St, Chicago 60606 | (312) 223-9669 |
| Arcca Inc 550 W Van Buren St 1220, Chicago 60607 | (312) 386-2300 |
| V3 Co 120 N La Salle St 1550, Chicago 60602 | (312) 419-1985 |
| Environmental Systems Design 175 W Jackson Blvd 1400, Chicago 60604 | (312) 372-1200 |
| Daedalus Systems Intl 222 N Maplewood Ave, Chicago 60612 | (312) 829-6970 |
| Csa Great Lakes Inc 21 W Illinois St 1, Chicago 60610 | (312) 822-0596 |
| Johnson Engineering Systems 333 N Michigan Ave 821, Chicago 60601 | (312) 630-0100 |
| Samartano & Co 221 N La Salle St 1926, Chicago 60601 | (312) 332-2326 |
| Teng & Assoc 205 N Michigan Ave 3600, Chicago 60601 | (312) 616-0000 |
| Lehman Design Consultants Inc 180 W Washington St 500, Chicago 60602 | (312) 201-9733 |
| Schiff & Assoc 105 W Madison St 1700, Chicago 60602 | (312) 332-7330 |
| Soodan & Assoc Inc 100 N La Salle St 1800, Chicago 60602 | (312) 553-0003 |
| Infrastructure Engineering Inc 33 W Monroe St, Chicago 60603 | (312) 425-9560 |
| Sargent & Lundy Llc 55 E Monroe St, Chicago 60603 | (312) 269-2000 |
| Techknow Engineering 30 E Adams St, Chicago 60603 | (312) 345-1009 |
| Laramore Douglass & Popham 332 S Michigan Ave 400, Chicago 60604 | (312) 427-8486 |
| Matrix Engineering Inc 33 W Jackson Blvd, Chicago 60604 | (312) 427-1200 |
| Mwh 175 W Jackson Blvd 1900, Chicago 60604 | (312) 831-3000 |
| Nayyar & Nayyar Intl 220 S State St 1400, Chicago 60604 | (312) 431-1010 |
| Peter R Krallitsch & Assoc 220 S State St 2112, Chicago 60604 | (312) 939-0603 |
| Robert G Burkhardt & Assoc 220 S State St 1800, Chicago 60604 | (312) 341-9292 |
| Rubinos & Mesia Engineers Inc 200 S Michigan Ave 1500, Chicago 60604 | (312) 663-5879 |
| Shamrock Consultants 175 W Jackson Blvd 2220, Chicago 60604 | (312) 939-5533 |
| T & M Assoc 220 S State St, Chicago 60604 | (312) 663-1766 |
| Wolfson Engineering 819 S Wabash Ave 500, Chicago 60605 | (312) 341-9204 |
| Globetrotters 300 S Wacker Dr 400, Chicago 60606 | (312) 922-6400 |
| Hntb Corp 111 N Canal St 1250, Chicago 60606 | (312) 930-9119 |
| Khatib & Assoc Inc 111 N Canal St 1600, Chicago 60606 | (312) 993-0438 |
| Klein & Hoffman Inc 150 S Wacker Dr 1900, Chicago 60606 | (312) 251-1900 |
| Ltk Engineering Svc 300 S Wacker Dr 2840, Chicago 60606 | (312) 922-0800 |
| Parsons Transportation Group 10 S Riverside Plz 400, Chicago 60606 | (312) 930-5100 |
| Paul E Mast Consulting Engrg 150 N Wacker Dr 1085, Chicago 60606 | (312) 641-3675 |
| R W Cooper & Assoc 230 W Monroe St 840, Chicago 60606 | (312) 899-1400 |
| Risk Management 150 S Wacker Dr 1300, Chicago 60606 | (312) 960-6200 |
| Shiner & Assoc 225 W Washington St 1625, Chicago 60606 | (312) 849-3340 |
| Singh & Assoc Inc 300 W Adams St 325, Chicago 60606 | (312) 629-0240 |
| Soros Associates Inc 222 S Riverside Plz 1800, Chicago 60606 | (312) 236-8100 |
| Stv Inc 200 W Monroe St, Chicago 60606 | (312) 553-0655 |
| Thomas A Wada Engineering 205 W Monroe St 400, Chicago 60606 | (312) 332-0250 |
| O & N Engineering 1513 W Taylor St, Chicago 60607 | (312) 432-0386 |
| Tolberts Roofing & Constr Inc 4246 S Wells St, Chicago 60609 | (773) 667-5490 |
| Halvorson & Partners 401 W Superior St, Chicago 60610 | (312) 787-4573 |
| Lyle Haag Engineering 1340 N Dearborn St 12c, Chicago 60610 | (312) 337-7054 |
| Metro Transportation Group 212 W Kinzie St 3, Chicago 60610 | (312) 853-0820 |
| Robert E Downey Ltd 1030 N State St 25l, Chicago 60610 | (312) 944-5166 |
| Stearn-Joglekar Ltd 432 N Clark St 300, Chicago 60610 | (312) 527-0347 |
| Terra Engineering Ltd 505 N La Salle Dr 250, Chicago 60610 | (312) 467-0123 |
| International Convention Staff 50 E Bellevue Pl, Chicago 60611 | (312) 787-1287 |
| Rodriguez International Cnslt 500 N Michigan Ave, Chicago 60611 | (312) 464-2357 |
| Shah Engineering Inc 330 N Wabash Ave 3200, Chicago 60611 | (312) 836-9000 |
| W H Engineering 101 E Erie St 87, Chicago 60611 | (312) 944-3392 |
| Sewer Systems Evaluations Inc 2500 W Arthington St, Chicago 60612 | (312) 666-1900 |
| Newtech Engineering 215 W 23rd St, Chicago 60616 | (312) 842-2723 |
| Macan Engineering Co 1564 N Damen Ave, Chicago 60622 | (773) 772-2000 |
| Saether Kolbjorn & Assoc 1062 W Chicago Ave 2, Chicago 60622 | (312) 942-1449 |
| J & C Engineering 1900 N Austin Ave, Chicago 60639 | (773) 237-7250 |
| Veterans Engineering Cnsltnts 4849 N Milwaukee Ave 102, Chicago 60630 | (773) 736-1900 |
| Structural Associates Inc 6015 N Nina Ave, Chicago 60631 | (773) 775-4100 |
| Particulate Solid Research Inc 4201 W 36th St, Chicago 60632 | (773) 927-9844 |
| Traffic Data Acquistion Inc 3709 N Oketo Ave, Chicago 60634 | (773) 625-6565 |
| Peco & Assoc 5735 S Harlem Ave, Chicago 60638 | (773) 586-0600 |
| R & T Engineering Chicago 60638 | (773) 229-8433 |
| L W Reiss & Assoc 6415 N Caldwell Ave, Chicago 60646 | (773) 792-1550 |
| National Engineering Svc 5901 N Cicero Ave 402, Chicago 60646 | (773) 794-0616 |
| T Y Lin Intl 5960 N Milwaukee Ave, Chicago 60646 | (773) 792-9000 |
| Mactec 5440 N Cumberland Ave 250, Chicago 60656 | (773) 693-6030 |
| Tecma Associates Inc 5519 N Cumberland Ave 1010, Chicago 60656 | (773) 763-5555 |
| Hamilton Associates Steelmill 6157 N Sheridan Rd 8m, Chicago 60660 | (773) 761-1867 |
| Levien-Rich Assoc Inc 549 W Randolph St, Chicago 60661 | (312) 466-0775 |
| Melvin Cohen & Assoc Inc 555 W Jackson Blvd 4, Chicago 60661 | (312) 663-3700 |
| Stanley Howell Assoc 118 N Clinton St, Chicago 60661 | (312) 346-0506 |
| Civil Group Engineering 203 N Wabash Ave, Chicago 60601 | (312) 214-0505 |
| Hanson Professional Svc 203 N Wabash Ave, Chicago 60601 | (312) 960-1353 |
| Hydro-Thermo-Power Inc 150 N Michigan Ave, Chicago 60601 | (312) 641-6164 |
| Institute Of Ind Engrs 333 N Michigan Ave 932, Chicago 60601 | (312) 283-5691 |
| J B Engineering Svc Llc 213 W Institute Pl 406, Chicago 60610 | (312) 664-1465 |
| Kce Ltd 35 E Wacker Dr, Chicago 60601 | (312) 795-1230 |
| Optima Consultants Corp 333 N Michigan Ave, Chicago 60601 | (312) 223-8414 |
| Perry & Assoc Llc 221 N La Salle St, Chicago 60601 | (312) 364-9112 |
| R L Millies & Assoc 221 N La Salle St, Chicago 60601 | (312) 332-8400 |
| Structured Systems Design Llc 180 N Stetson Ave, Chicago 60601 | (312) 602-7150 |
| Ursula Phoenix Consulting 307 N Michigan Ave, Chicago 60601 | (312) 236-2933 |
| Pathfinder Associates 55 E Washington St 1540, Chicago 60602 | (312) 372-1058 |
| Sts Consultants 111 W Washington St, Chicago 60602 | (312) 781-7870 |
| Koenigsberg Engineering Pc 104 S Michigan Ave, Chicago 60603 | (312) 425-1297 |
| Patrick Engineering 55 E Monroe St 3450, Chicago 60603 | (312) 630-8680 |
| Siva Yam & Assoc 55 W Monroe St 630, Chicago 60603 | (312) 368-9933 |
| T N & Assoc 100 W Monroe St 913, Chicago 60603 | (312) 220-7000 |
| Urs Corp 122 S Michigan Ave 1920, Chicago 60603 | (312) 939-1000 |
| Henneman Raufeisen & Assoc 224 S Michigan Ave 1275, Chicago 60604 | (312) 583-1400 |
| S P Engineers Ltd 53 W Jackson Blvd, Chicago 60604 | (312) 212-1089 |
| Sigma Engineering Inc 28 E Jackson Blvd, Chicago 60604 | (312) 360-0359 |
| Thornton-Tomasetti Group Inc 14 E Jackson Blvd 1100, Chicago 60604 | (312) 346-6085 |
| Milhouse Engineering & Constr 47 W Polk St 244, Chicago 60605 | (312) 987-0061 |
| Short Elliott & Hendrickson 727 S Dearborn St, Chicago 60605 | (312) 588-0940 |
| Sowlat Inc 410 S Michigan Ave, Chicago 60605 | (312) 431-1414 |
| Tylk Gustafson & Assoc 407 S Dearborn St, Chicago 60605 | (312) 341-0055 |
| Jacobs Engineering Group Inc 222 S Riverside Plz 1400, Chicago 60606 | (312) 655-9207 |
| Kimley-Horn & Assoc Inc 205 W Wacker Dr 2125, Chicago 60606 | (312) 726-9445 |
| Kroeschell Inc 101 N Wacker Dr, Chicago 60606 | (312) 781-9940 |
| Payment Engineering Inc 27 N Wacker Dr 510, Chicago 60606 | (312) 674-4972 |
| Pitometer Associates Inc 20 N Wacker Dr 1530, Chicago 60606 | (312) 236-5655 |
| Pma Consultants 333 W Wacker Dr 880, Chicago 60606 | (312) 920-0404 |
| Residuals Management Technolgy 222 S Riverside Plz 820, Chicago 60606 | (312) 575-0200 |
| Hbk Engineering 940 W Adams St, Chicago 60607 | (312) 432-0076 |
| K Eng Llc 1249 W Cottage Pl, Chicago 60607 | (773) 238-8968 |
| Probe Consulting Svc 850 W Jackson Blvd 310, Chicago 60607 | (312) 455-9850 |
| Qualitech Engineering 725 S Wells St, Chicago 60607 | (312) 322-0694 |
| Qualitech Engineering Llc 725 S Wells St 600, Chicago 60607 | (773) 731-5009 |
| Tac 1945 S Halsted St, Chicago 60608 | (312) 421-0465 |
| Taylor Systems Chicago 60609 | (773) 579-1377 |
| Halvorson & Kaye 600 W Chicago Ave 650, Chicago 60610 | (312) 274-2400 |
| Koenigsberg Engineering Pc 1550 N Lake Shore Dr 17b, Chicago 60610 | (312) 867-0425 |
| Mep Consultants 351 W Chicago Ave, Chicago 60610 | (312) 787-8940 |
| Reliability Analysis Assoc 1440 N Lake Shore Dr, Chicago 60610 | (312) 274-0542 |
| Weber Consultants 116 W Illinois St 6w, Chicago 60610 | (312) 644-6180 |
| Mpr Engineering 233 E Erie St 207, Chicago 60611 | (312) 751-2006 |
| J & C Engineering 3711 N Ravenswood Ave, Chicago 60613 | (312) 670-0281 |
| Land Strategies Inc 1700 W Irving Park Rd 202, Chicago 60613 | (773) 305-0800 |
| Quest Design Group Inc 3660 N Lake Shore Dr, Chicago 60613 | (773) 832-9066 |
| Wellington Associates 707 W Junior Ter, Chicago 60613 | (773) 472-4820 |
| Inventables 2000 N Racine Ave, Chicago 60614 | (773) 697-0130 |
| N V Morcom Inc 449 E 31st St, Chicago 60616 | (312) 842-3100 |
| Predictek 10 W 35th St 11s7, Chicago 60616 | (312) 674-9805 |
| Charis Kagis 3450 W Irving Park Rd, Chicago 60618 | (773) 588-6443 |
| State Testing Llc 3210 N Troy St, Chicago 60618 | (773) 279-9253 |
| Yuko Engineering 2240 W Cullom Ave, Chicago 60618 | (773) 509-9700 |
| Urban Engineering Consultants 2251 W 79th St, Chicago 60620 | (773) 436-3351 |
| Leading Edge Engineering 833 W Chicago Ave, Chicago 60622 | (312) 563-9401 |
| Lakewood Engineering 4400 W Ohio St, Chicago 60624 | (773) 722-1768 |
| Invenium Incorporated 3317 W Eastwood Ave, Chicago 60625 | (773) 583-0801 |
| Sabre Technical Svc Corp 4921 N Damen Ave 3, Chicago 60625 | (773) 271-6600 |
| Johnson Limited 4651 N Elston Ave, Chicago 60630 | (773) 545-2772 |
| Kleen-Air Svc Co 5338 N Northwest Hwy, Chicago 60630 | (773) 631-0007 |
| Mva Engineering Consultant 5128 N Elston Ave 201, Chicago 60630 | (773) 545-5290 |
| Metcalf & Eddy 8420 W Bryn Mawr Ave 750, Chicago 60631 | (773) 756-2400 |
| Orb Enterprises Inc 4724 S Christiana Ave, Chicago 60632 | (773) 927-8600 |
| Insight Product Development 4660 N Ravenswood Ave, Chicago 60640 | (773) 907-9500 |
| Moradi Multi Dimension 6201 W Touhy Ave, Chicago 60646 | (773) 355-5059 |
| S & N Roofing 2337 N Sacramento Ave, Chicago 60647 | (773) 227-1531 |
| Prism Engineering Inc 7351 S Merrill Ave, Chicago 60649 | (773) 493-9000 |
| Christian Bingham 5517 W Chicago Ave, Chicago 60651 | (773) 626-2595 |
| Inspec Inc 8618 W Catalpa Ave, Chicago 60656 | (773) 444-0206 |
| Tania Consulting Svc Inc 5151 N Harlem Ave, Chicago 60656 | (773) 631-8693 |
| James F Rowland 3033 N Sheridan Rd, Chicago 60657 | (773) 477-1354 |
| Seymour Lepp & Assoc 6016 N Saint Louis Ave, Chicago 60659 | (773) 583-1032 |
| Rafson Engineering 5601 N Sheridan Rd, Chicago 60660 | (773) 596-5455 |
| Pasco Inc 216 S Jefferson St 102, Chicago 60661 | (312) 441-9738 |
| Wright Engineers Inc 648 W Washington Blvd, Chicago 60661 | (312) 372-1946 |