Book of Giants

CONTRACTOR's Top 100 mechanical contractors and who they are


A Haberberger technician welds a section of cast iron pipe at the company's new piping facility.

Tale of Two Giants

April 28, 2023
Southland Industries
The new Central Records Complex (CRC) located in Winchester, Virginia.
Harris Co.
A large prefabricated piping assembly for the Minneapolis Bus Garage job. Note the worker in back for scale.
Photo 79465229 © Prasit Rodphan |
Dreamstime S 79465229
210929 1930 Boren 017
John W. Danforth Co.
Buffalo Welding Shop
Img 4919 Promo


Four of TDI's employee-partners. Phot: TDIndustries
Wic Week Updated

TDIndustries Celebrates Women in Construction Week

March 10, 2021
The company is highlighting women in the industry throughout March.
From left to right, Jones, Lackey and Haberberger. Photo: Haberberger, Inc.
Kyle Jones Rick Lakey Sam Haberberger

Haberberger Welcomes Three New Employees

March 8, 2021
The mechanical contractor welcomes Rich Lackey, Sam Haberberger and Kyle Jones.
Harris Logo

Harris Named 2021 Top Workplaces USA

Feb. 1, 2021
Honor highlights people-centered culture and reflects employee initiatives.
Wa Buiilding 800x1200 1

Wiegmann Associates Celebrates its 25th Anniversary

Dec. 28, 2020
The company has now engineered and installed more than $1 billion in commercial HVAC comfort solutions across 42 states.
The Northern Business Center in Thornton, CO.

Murphy Company Acquires Northern Business Center

Oct. 9, 2019
Mechanical contractor to consolidate offices/expand fabrication capacity.
Contractormag 13475 Umc Logo 3

UMC Announces Launch of New Brand

Sept. 30, 2019
University Mechanical Contractors launches new brand, visual identity and website.
University Mechanical Contractors team members (L. to R.) Thomas Booth, Bill Jones, Josh Wilson, Kirk Baisch, Travis Jamison.

UMC Receives AGC Washington Grand Award for Safety Excellence

May 23, 2019
The award comes on the heels of UMC winning the National 1st Place MCAA/CNA Safety Excellence Award in their category for the second year in a row.
Contractormag 12842 Rheem Commercialtanklessracksystem Hotel Storage Room
Steve Cunningham.

TDIndustries Hires Steve Cunningham as New Chief People Officer

April 16, 2019
In his new role at TD, Cunningham will support the growth of a company that has grown to 2,600 employee-owners.
Contractormag 11692 Limbach Logo

Limbach Holdings to Acquire Dunbar Mechanical

Sept. 20, 2018
Dunbar is a privately-owned provider of mechanical construction services in Toledo, Ohio and the surrounding region.