Heating •  Ventilation • Air-Conditioning


Markgraf mechanical

Gary Markgraf


Prior to starting Markgraf Mechanical, Inc., Gary graduated from Northeast Metro Technical College in 1991 in Heating & Air Conditioning Equipment Sales & Service.  He worked for a few other companies prior to starting Markgraf Mechanical, Inc. in September of 2002. Gary also has his Universal EPA Certification, Power Limited Electrical License, Master Ventilation License and Warm Air License.


Tammy Markgraf

Zach Markgraf



Tammy has been married to Gary since 1993 and has managed Markgraf Mechanical since the start in 2002. Tammy graduated from Rasmussen Business College in 1994 in Office Management.  Prior to Markgraf Mechanical, she worked as an office manager with another company.   With a management background it was a good fit when they decided to start their own business. She is mostly found in the office but also will be found picking up supplies and equipment and you may see her on the job site from time to time.

Zach is the son of Gary and Tammy has worked for Markgraf Mechanical, Inc. since 2013 and has experience with service and installation on furnaces, air conditioners, water heaters, air exchangers and more.  Zach graduated from Century College in 2018 with an Associate of Applied Science Degree  in Heating, Ventilating, Air Conditioning and Refrigeration Technician and also has his Universal EPA certification.

Scott Thompson


Scott has worked for Markgraf Mechanical since October of 2018.  He graduated from Century college in 2014 with a Diploma in Facility Systems Technician and a Certificate in Facilty Systems Commercial.  He also has his EPA Universal Card and a Special Boiler license.  Prior to working for Markgraf Mechanical Scott did installation in the new construction Installation Department and Retro Fitting and Commercial Department for another HVAC company.

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Scandia Minnesota

651.433.3714 or 651.238.9480