Sewell Mechanical has served commercial and residential customers in northeast Oklahoma since 1991.
Licensed & Insured

What We Specialize In

  • Restaurant Preventative Maintenance Agreements
  • Heating, Air Conditioning, Ventilation & Refrigeration
  • Ice Machine Repair, Sales and Leasing
  • Walk-in Cooler & Freezer Repair, Sales and Installation
  • Residential Heating, Air Conditioning and Ventilation

We are a contracted service representative for Manitowoc Ice, a factory-trained installer for Thermokool Walk-in Boxes, and serve as a warranty representative for most major commercial refrigeration and ice machine manufacturers.


Andrew Sewell completed his education at OSU IT in the Spring of 1984, and  he immediately began working for a local heating and air company in Tulsa.

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Driven by his own entrepreneurial spirit and having a young family, Andrew decided to start his own business, Sewell Mechanical, Inc. His wife and co-owner Ronica continued to work full-time at a local bank, while keeping the books for the company in the evenings. All operations and record keeping were done out of their home.

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Hired first full-time technician.

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Ronica quits her full-time job at the bank in order to devote all of her professional time working for the company.

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Purchased shared office space in Tulsa.

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Celebrating 10 years of business, SMI now had a staff of 4 full-time technicians.

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SMI marked its 20th year in business by purchasing land and building a new stand-alone office and warehouse.

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Hired first full-time office staff in order to manage continued growth of the business.

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25 years later, SMI employs 7  full-time technicians and 1 office staff personnel. Owners, Andrew and Ronica, have apprenticed 11 technicians. 3 past apprentices have worked full-time for the company after graduating from OSU IT.

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