Premier Mechanical and Plumbing Contractor on Large, Complex Construction Projects since 1908


The Process & Industrial Piping Expert


High-quality Provider of Specialty Welding and Fabricated Components

The Thomas J. Dyer Company is a full-service mechanical and plumbing company that has performed high-quality installation, process & industrial piping and fabrication for a variety of facilities throughout the U.S. since 1908. Our highly skilled team is committed to providing our customers the premier level of service, expertise and professionalism in the markets we serve.


Look to the experts who can complete the most complex project while meeting your highest expectations. We have extensive expertise in completing mechanical and plumbing projects for:

  • Hospitals
  • Educational facilities
  • Stadiums
  • Food, chemical and manufacturing plants
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Process & Industrial

Our licensed and certified specialists will conduct ongoing maintenance on your pipes and fixtures. We have a full offering of Industrial & Process Piping services for:

  • Process piping system
  • Heavy industrial
  • Oil and gas
  • Steam and cooling
  • Manufacturing plants
  • Food and beverage
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Our highly efficient and scalable fabrication division serves a wide range of applications, including skid design, pipe configuration and other components used in a variety of industries.

  • Petroleum
  • Specialty chemical
  • Agriculture
  • Enzyme
  • Mixing
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Project Portfolio


TJ Dyer was brought into this Refinery Shutdown project early on in the planning phase to come up with a budget and a schedule for the entire refinery shutdown. We generated a manpower and cost loaded P6 (Primavera) schedule for all trades. During the two-week outage, we completed 12,500 total field man hours, 1,100 shop fab hours of demo, upgraded piping installs, valve replacements and safety management on the refineries’ major fixed equipment and all of the piping systems.


Alkermes is a pharmaceutical manufacturing facility located in Wilmington, OH. The multi-phase project consisted of a clean steam generator and associated distribution piping which included over 2000 feet of orbitally welded stainless steel piping. The project also included 1000 feet of WFI (Water for Injection) piping that was also an orbitally welded system. The final phase of work final connections to process equipment serving their production equipment. The project also required 142 tie-ins to multiple existing services over three shutdowns during the duration of the project.

Koch Foods

In 2018 Koch Foods in Fairfield, OH underwent an expansive utilities upgrade to their existing facility. The thermal heating system was upgraded to a new 25,000 gallon 35 million BTU 4 burner unit. Over 600 feet of 18” full X-ray welded carbon steel distribution piping serves the existing facility. Our scope of work also included one 72-hour shutdown to tie in new distribution piping to cooking equipment to eliminate all but 1 day of processing time.

Procter and Gamble TDSC

This project located at 5280 Vine Street in Cincinnati, OH is a complete pilot plant replacement in an existing facility. The project consists of fully welded stainless-steel high-pressure high temperature compressed air system, a stainless and carbon steel process steam system, as well as a high-pressure high temperature wash down system with 100% X-ray quality weld requirements.


TJ Dyer has completed work at multiple SugarCreek facilities throughout the region. Our scope of work has consisted of fully welded stainless steel underground piping systems to fully welded stainless steel process water lines. TJ Dyer has also worked with SugarCreek on 100% design assist projects involving full HVAC and process water systems.

Kroger Project Infinity

Project Infinity is a 320,000 square feet automated grocery sorting and delivery warehouse located in Monroe, OH. TJ Dyer installed the complete HVAC system along with the compressed air system serving the pneumatic controls for the robotic rail system.

JTM Harrison OH

JTM Food Group is a national leader in the creation of fully cooked food industry. In 2017 TJ Dyer installed Stainless Steel Process Piping, underfloor heating systems, as well as the complete HVAC system in their brand new 193,000 square foot, state-of-the-art manufacturing plant and distribution center.

Castellini Tomato and Banana Line Expansion

This project located in Wilder, Kentucky, added nearly 30,000 square feet and 3 additional fruit and vegetable sorting lines. TJ Dyer installed all washdown and equipment water piping as well as shop air systems for sorting equipment.

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