Ranked by 2018 companywide billings
| 1 | Murphy Co. Mechanical Contractors and Engineers 1233 N. Price Rd. St. Louis, MO 63132 314-997-6600 murphynet.com See full profile |
$266.40 million | 566 | 959 | diversified mechanical and industrial contractor specializing in process piping, HVAC, refrigeration, plumbing, design/build, fabrication, energy solutions and 24 hour services | Patrick Murphy Jr. |
| 2 | GRP Mechanical Co. Inc. 1 Mechanical Dr. Bethalto, IL 62010 618-258-9000 grpmech.com See full profile |
$146.00 million | 565 | 565 | industrial and commercial piping, boilers, HVAC, pipe fabrication and service, electrical installation and energy performance contracting for schools and governments | Tom DeClue III |
| 3 | icon Mechanical Construction & Engineering LLC 1616 Cleveland Blvd. Granite City, IL 62040 618-452-0035 iconmech.com See full profile |
$119.00 million | 125 | 450 | design/assist and design/build mechanical construction, mechanical engineering and design, commissioning services and prefabrication, modularization and off-site construction experts | Jeff Rush |
| 4 | Charles E. Jarrell Contracting Inc. 4208 Rider Trail N. Earth City, MO 63045 314-291-0100 jarrellcontracting.com See full profile |
$85.50 million | 300 | 300 | design/build mechanical, service and engineering contracting for energy-efficient, commercial and industrial, institutional and renovation/rehab projects | Michael S. Jarrell Michael C. Jarrell |
| 5 | Integrated Facility Services Inc. 1055 Cassens Industrial Ct. St. Louis, MO 63026 636-680-2100 intfs.com See full profile |
$67.60 million | 212 | 242 | design/build mechanical, HVAC sales and service, building automation, plumbing, fire protection/sprinklers, energy services, process piping and sheet metal fabrication | John Rundquist |
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