| A&R Mech Contractors | | | |
| AECON-WACHS TECH SERVICE | | | |
 | | 1401 Buchanan Road Evansville, IN 47720 | 812-425-9389 | |
 | | 7944 Bell Oaks Drive Newburgh, IN 47630-2547 | 812-853-2305 | |
| BILFINGER | | | |
 | | 400 E. Illinois Evansville, IN 47711 | 812-423-5851 | Serving Evansville and surrouding areas since 1920. Free estimate during regular business hours. M-F 7-4 |
| Central State Construction | 15358 E Clarksville Rd Marshall, IL 62441 | | |
| Charter Mechanical | | | |
| DELUKA | | | |
 | | 2512 N Cullen Ave., Suite C Evansville, IN 47715 | 812-471-3788 | |
| Great Arrow Builders | | | |
 | | P. O. Box 1998 Bloomington, IN 47402 | 812-339-2579 | |
| HARRIS MECH | | | |
| heartland mech | | | |
| Heggemann | | | |
 | | 2501 S Kentucky Ave Evansville, IN 47714 | 812-925-3930 | |
 | | 424 W. Tennessee St. Evansville, IN 47710 | 812-425-9131 | |
| JAMAR | | | |
| jergins | | | |
| Mel-Kay Electric Co., Inc. | 1511 N. Garvin St Evansville, IN 47711 | 812-423-1128 | |
 | | 402 3rd Avenue Jasper, IN 47546 | 812-482-6766 | |
| MORRISON | | | |
| Murray | | | |
| newton | | | |
| Newtron | | | |
| North Mech Services | | 317-519-0993 | |
| Olson Plumbing & Heating | | | |
| plumbing Planning Construction | | | |
| Quality Plumbing and Heating | | | |
| Sadler Mech | | | |
| Sims Electrical | PO Box 4037 Evansville, IN 47724 | 812-647-9990 | |
| Stack Bros | | | |
| STEVENS ENGINEERING | | | |
| TESTCO | | | |
| Tweet and Garrot | | | |
| UPS INDUSTRIAL | | | |
| Walker Plumbing LLC | 1615 e Tierney Street Bloomington, IN 47401 | 812-360-4267 | |
 | | 2051 W. Industrial Park Drive Bloomington, IN 47401 | 812-339-4669 | |
| Wiggs Excavating | PO Box 866 Benton, IL 62812 | 618-927-7171 | |