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Principals description

Mark McMillan

  • BSME Texas A&M University
  • 2 years design engineer Brown & Root
  • 5 years outside sales with McMillan Equipment Company
  • 27 years MJEC
Mark McMillan - Principal

Mark James P.E.

  • BSME – University of Arkansas
  • 5 years Carter & Burgess Engineers
  • 5 years Engineered Air – Branch Manager
  • 11 years MJEC
Mark James P.E. - Principal

Robert McMillan

  • 3 years H&G Systems – estimator and CAD designer
  • 3 years CCRD Partners – HVAC Designer
  • 15 years MJEC
Robert McMillan - Principal

Isaac Henson, LEED AP

  • BSME Texas A&M University
  • 5 years York International
  • 9 years MJEC
Isaac Henson, LEED AP - Principal

Jeff Langlitz, LEED AP

  • BSME Texas A&M University
  • 3 years Johnson Controls
  • 9 years MJEC
Jeff Langlitz, LEED AP - Principal

Latest News

McMillan James Expands to Houston!

July 1, 2016 Houston, Texas McMillan James is proud to announce the expansion of their operations to South Texas – by opening a new branch office in Houston, serving the Greater Houston and Gulf Coast region.  Ian Taxman, formerly of … Continue reading

2014 MJEC Hydronic Product Show

ENJOY Product Demo, Poker Run, BBQ & Seminars Prizes awarded at poker run and seminars. To sign up for Seminars visit and click on your preferred seminar!

MJEC Announces the Opening of a State-of-the-Art Training and Distribution Center.

On June 15th, McMillan James opened the doors to a new 15,000 square foot facility located at 810 Mustang Drive in Grapevine. The new facility, adjacent to the home office at 1010 Mustang Drive, houses a training center, product showroom, … Continue reading

McMillan James opens Houston office!
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