| 1 | 1 | ShoffnerKalthoff Mechanical Electrical Service 3600 Papermill Drive Knoxville, TN 37909
| 865-523-1129 skmes.com Knox
| 54 377 NA
| 60% / 15% 25% / NA NA / NA
| Min Kao-UT Computer Science Engineering Building (Blaine Construction), UHS Surgery Expansion at UT Medical Center (Johnson & Galyon), Neyland Stadium Expansion Phase 1C (Blaine), Knoxville Public Office Building (Welty Construction), Scripps Office Expansion (Blaine), Concord United Methodist Church (Rentenbach), UT Vet Center (Johnson & Galyon), UT Music Center (Johnson & Galyon), LMU Math and Science (LMU), UT Lighting Retrofit (UT)
| David Dugger President, CEO 1970
|
| 2 | 2 | Interstate Mechanical Contractors 3200 Henson Road Knoxville, TN 37921
| 865-588-0180 interstatemechanical.com Knox
| 13 143 $24.2 million
| 30% / 5% 65% / NA NA / 300
| UTK Steam Distribution, UTK Grieve Hall, Hawkins County Schools, Maryville HS, LMU Math & Science Bldg., Embassy Suites, Northview Sr. Academy
| Terry L. Self President 1982
|
| 3 | 3 | Engert Plumbing & Heating 1715 Riverside Drive Knoxville, TN 37915
| 865-524-2535 engert.biz Knox
| 10 95 NA
| 100% / NA NA / NA NA / NA
| LeConte Medical Hospital, Roane Medical Center, Southwest Elementary School, Rhea Co. High School
| Donna G. Johnston President 1891
|
| 4 | 4 | Hicks & Ingle Corp. 8909 Joe Daniels Road Knoxville, TN 37931
| 865-927-4529 hi-corp.org Knox
| 3 28 $7.3 million
| 50% / 50% NA / NA NA / 10
| Alcoa Inc., UT-Battelle, Johnson Controls, BWXT, DOE, TVA
| Katrina M. Ivey President, CEO 1965
|
| 5 | 5 | Advanced Mechanical Services P.O. Box 1148 Athens, TN 37371
| 423-745-2595 amspipe.com Mcminn
| 2 8 NA
| 5% / 50% 5% / 40% NA / NA
| NA
| Phil S. Fletcher President 1984
|