About MMI

MMI Industrial & Steel has deep roots in Arizona. This family owned business founded in 1974 has grown from a small millwright services company to a multi-faceted corporation with solid operations in structural steel fabrication & erection as well as continued growth in industrial millwright services. Today MMI is one of the larger employers in Mesa, AZ supporting more than 100 families who contribute daily to the success of this growing venture.

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Our Proud History



Owner Clifton Pinckard starts with truck and welder


Milling Machinery, Inc. (MMI) name is developed and incorporated


Land in Mesa is purchased and a small office and fabrication shop is constructed

MMI Timeline Photo

MMI does its first steel erection project at the new Frito-Lay Plant in Casa Grande, AZ



Our Core Values


Choose to be happy and treat others with respect.


Seek learning and create opportunities. Adapt to Change.


Be ambitious and obsessed with quality.


Demonstrate humility and integrity and put the team first.

We Value Safety

MMI Industrial & Steel highly values the safety of our employees. We utilize several safety training avenues and employ many other programs to ensure the safety of all our workers on jobsites and in our shop. Below are just a few of the things we do to make safety a priority.

  • Drug and Alcohol-Free Workplace
  • Mobile UA Testing Program
  • Stop Work Authority
  • EMOD < 1
  • Annual Safety Training for all Employees
  • MMI Safety Committee
  • Safety Stipend for Protective Footwear and Prescription Safety Glasses
  • OSHA 30 & MSHA Training
  • Rigger/Signal Qualifications
  • Shop and Field Safety Audits
  • Full-Time Safety Director