Jack Matherly founded Matherly Mechanical in 1962 with a total work force of four employees. Today with an average work force of 200 skilled tradesmen, office employees and management, Matherly Mechanical is one of the largest in Oklahoma.

Throughout the years Matherly Mechanical Contractors, LLC. has been involved in virtually every phase of commercial and industrial piping and sheet metal work, with specialized expertise in facilities such as hospitals, industrial plants, and production facilities.

Matherly Mechanical Contractors, LLC. maintains a large inventory of piping, and plumbing materials. This assures fast job start-up and the ability to handle unexpected changes and repairs. With the help of AutoCAD coordination drawings and the use of automated fabrication equipment, our goal is 100% customer satisfaction.

                        Past Presidents

                          Jack Matherly                      Dale Matherly                      


                          1962 - 1987                                         1988 - 2012



"Personal Injury, property damage and resulting loss of production are not acceptable ways of doing business."

We believe that we are obligated to protect the human, physical, and financial resources of both the company and the client. We recognize our responsibility to manage our business in a manner that will effectively conserve and utilize these resources.

It is our belief that all accidents occur as the result of a specific cause, or causes, and are therefore preventable.

Consistent with these beliefs, we will endeavor to:

  • Provide a safe and healthful workplace free from recognized hazards.
  • Provide necessary instruction and protective equipment and measures when hazardous work must be performed.
  • Recognize accident prevention as an integral part of all operational activity and not a separate program.
  • Hold Managers and Supervisors at all levels accountable for the safety performance of their operations
  • Provide professional personnel to support the Safety and Health Program to monitor performance.

Any recommendations to improve our Safety Program are encouraged.

Environmental Systems Balance

Matherly Mechanical Contractors, LLC. is a NEBB (National Environmental Balancing Bureau) certified contractor, with certificates in “Air and Hydronic Environmental Systems”, as well as “Sound and Vibration Measurement”. Systems are tested, adjusted, and balanced to design requirements, and reported accurately to the customer. Matherly Mechanical has (5) NEBB Certified Supervisors in the office; we have more certified supervisors than any firm in the state.

The National Environmental Balancing Bureau (NEBB) is a nonprofit organization, founded in 1971 by contractors in the heating, ventilating and air conditioning (HVAC) industry.


Matherly Mechanical Contractors, LLC. has completed institutional work for the hospital / healthcare industry, as well as for the educational sector. Institutional work has been performed on both plan and spec, and design / build work. The price for past institutional projects has ranged from $1,000.00 to well over $20,000,000.00

Hospital / Healthcare
Matherly Mechanical Contractors, LLC. has performed HVAC, plumbing, and medical gas systems for virtually every type of hospital and healthcare area of the medical institutions, as listed below:

  • Surgery Suites and stand alone surgery centers.
  • Emergency rooms.
  • CT scan.
  • MRI’s.
  • Patient rooms.
  • Pediatric intensive care units.
  • Neo-natal intensive care units.

All of the above have been performed in brand new facilities, as well as in active parts of a fully functioning hospital. Matherly Mechanical has extensive experience working within operating areas of hospitals. We are familiar with the extensive planning, flexible schedules and attention to safety, cleanliness and noise regulations that are required to complete hospital construction work successfully, without ever jeopardizing patient safety. Additionally, our design build expertise allows us to react immediately to any “surprises” that may arise when the working areas become exposed during the demolition. This allows the fast paced construction to continue without costly delays in engineering.


Matherly Mechanical Contractors, LLC. has also performed HVAC and plumbing work on many college and university campuses. This has included work in the following areas:

  • Site steam, hot water, and chilled water loops.
  • Central Plants
  • Classrooms
  • Auditoriums
  • Gymnasiums
  • Stadiums
  • University centers
  • Dormitories
  • Laboratories

Quality Awards

In 1998, Matherly Mechanical Contractors was awarded the U.S. Army Corps of Engineer’s "Military Construction Contractor of the Year"; this is a national award that is only given once a year. Matherly Mechanical was the first mechanical contractor to receive this award, because this is normally awarded to general contracting firms. The award reads:

"Matherly Mechanical Contractors LLC. demonstrated exceptional performance in replacing heating, ventilation, and air conditioning utility support systems in the 110,000 S.F. corrosion control facility at Tinker Air Force Base, Oklahoma. Despite the projects inherent dangers, Matherly delivered the product on time, without any serious safety incidents, with minimal cost growth and without impact to the on-going production line. They achieved outstanding ratings in 29 of the 33 performance elements while employing small disadvantaged and women owned small business subcontractors on 28% of the work. Matherlys' performance on this project represents the highest standards for construction and customer satisfaction as established by the Corps of Engineers."