| Entity Name | Type | License # | City | Status | Action |
|---|---|---|---|---|---|
| TRI-COUNTY ENGINEERING INC | Business | 184001198-0002 | HOMER GLEN | ACTIVE | Verify |
| TRI-G CONSTRUCTION SERVICES INC | Business | 184000835-0002 | LOCKPORT | NOT RENEWED | Verify |
| TRI-STATE ENTERPRISES INC | Business | 184004804-0002 | AURORA | ACTIVE | Verify |
| TRI-TECH ENGINEERING | Business | 184002452-0002 | BATAVIA | NOT RENEWED | Verify |
| TRIA ARCHITECTURE INC | Business | 184004118-0001 | BURR RIDGE | ACTIVE | Verify |
| TRIAD SURVEYING | Business | 184003207-0008 | DECATUR | ACTIVE | Verify |
| TRIANT PROFESSIONAL SERVICES P.L.L.C | Business | 184009078-0002 | LANSING | ACTIVE | Verify |
| TRICORE ENVIRONMENTAL, PLLC | Business | 184009155-0002 | NAPERVILLE | NOT RENEWED | Verify |
| TRIFECTA ENGINEERING LTD | Business | 184005994-0002 | NAPERVILLE | NOT RENEWED | Verify |
| TRILON DESIGN ARCHITECTS & DESIGNERS | Business | 184002102-0001 | NAPERVILLE | NOT RENEWED | Verify |
| TRINE CONSTRUCTION CORP. | Business | 184009408-0002 | SAINT CHARLES | ACTIVE | Verify |
| TRINITY BRIDGE & IRON INC | Business | 184005582-0003 | COAL CITY | ACTIVE | Verify |
| TRIODYNE ENVIRONMENTAL ENGINEERINS INC | Business | 184001001-0002 | NILES | CANCELLED | Verify |
| TRIODYNE FIRE AND EXPLOSION | Business | 184001022-0002 | OAK BROOK | NOT RENEWED | Verify |
| TRIODYNE INC | Business | 184001021-0002 | NORTHBROOK | NOT RENEWED | Verify |
| TRIODYNE RECREATION ENGINEERING INC | Business | 184000126-0002 | HUNTLEY | NOT RENEWED | Verify |
| TRITON CONSULTING ENGINEERS LTD | Business | 184000960-0006 | SCHAUMBURG | NOT RENEWED | Verify |
| TRITON TESTING AND DESIGN INC | Business | 184005712-0002 | FREEPORT | NOT RENEWED | Verify |
| TRIVERS ASSOCIATES INC | Business | 184002330-0001 | BELLEVILLE | ACTIVE | Verify |
| TRK ARCHITECTURE PC | Business | 184005025-0001 | WHEATON | NOT RENEWED | Verify |
| TROMP ARCHITECTS LTD | Business | 184006783-0001 | WESTERN SPRINGS | ACTIVE | Verify |
| TROPICAL ENVIRONMENTAL, INC. | Business | 184008471-0002 | ALGONQUIN | ACTIVE | Verify |
| TROTTER AND ASSOCIATES INC | Business | 184002148-0007 | SAINT CHARLES | ACTIVE | Verify |
| TROW ENGINEERING CONSULTANTS INC | Business | 184001185-0002 | CHICAGO | NOT RENEWED | Verify |
| TROY ARCHITECTS LLC | Business | 184004663-0001 | DEER PARK | NOT RENEWED | Verify |
| TRUE NORTH CONSULTANTS INC | Business | 184001709-0002 | MENDOTA | CLOSED | Verify |
| TRUE NORTH CONSULTANTS INC | Business | 184005436-0002 | NAPERVILLE | ACTIVE | Verify |
| TRUE NORTH ENGINEERING LLC | Business | 184006931-0006 | NAPERVILLE | NOT RENEWED | Verify |
| TRUE NORTH SURVEYING PLLC | Business | 184008359-0008 | EFFINGHAM | ACTIVE | Verify |
| TRYCO INC | Business | 184002904-0001 | CHICAGO | ACTIVE | Verify |
| TS ENGINEERING PLLC | Business | 184008787-0003 | SKOKIE | ACTIVE | Verify |
| TSC-DEVELOPMENT, INC | Business | 184008867-0002 | RICHTON PARK | ACTIVE | Verify |
| TSD RAIL SPECIALISTS LLC | Business | 184004130-0014 | CHICAGO | CANCELLED | Verify |
| TSOLINAS/MORENO & ASSOCIATES INC | Business | 184000306-0001 | ARLINGTON HEIGHTS | NOT RENEWED | Verify |
| TURLEY INC | Business | 184001861-0001 | CHICAGO | NOT RENEWED | Verify |
| TURNER & CHEN ASSOCIATES INC | Business | 184000160-0001 | SCHAUMBURG | NOT RENEWED | Verify |
| TURNER ARCHITECTURAL | Business | 184000261-0001 | KANKAKEE | NOT RENEWED | Verify |
| TURNKEY ENVIRONMENTAL CONSULTANTS INC | Business | 184000365-0001 | MOUNT PROSPECT | NOT RENEWED | Verify |
| TUSCHALL ENGINEERING | Business | 184000869-0002 | BURR RIDGE | NOT RENEWED | Verify |
| TUYA ENGINEERING LLC | Business | 184006448-0002 | CHICAGO | ACTIVE | Verify |
| TWIG TECHNOLOGIES, LLC | Business | 184001251-0015 | WHEATON | ACTIVE | Verify |
| TWO MANY ARCHITECTS PLLC | Business | 184008816-0001 | CHICAGO | NOT RENEWED | Verify |
| TYLER OAKS PROF LAND SURVEYORS | Business | 184003800-0008 | SYCAMORE | NOT RENEWED | Verify |
| TYLK GUSTAFSON AND ASSOCIATES INC | Business | 184001440-0003 | CHICAGO | NOT RENEWED | Verify |
| TYSON ENGINEERING INC | Business | 184001136-0010 | KANKAKEE | NOT RENEWED | Verify |
| U K AND ASSOCIATES | Business | 184001892-0002 | ADDISON | NOT RENEWED | Verify |
| U-STUDIOS INCORPORATED | Business | 184007965-0001 | SWANSEA | NOT RENEWED | Verify |
| U.S. ARCHITECTS, P.C. | Business | 184008057-0001 | ROCKFORD | ACTIVE | Verify |
| UC SERVICE CORPORATION | Business | 184004345-0003 | WAUKEGAN | NOT RENEWED | Verify |
| UISC, PLLC | Business | 184008713-0005 | CHICAGO | ACTIVE | Verify |