About MSI


MSI FamilyMechanical Service of Galesburg, Inc., (“MSI”) is a family owned company officially incorporated in 1972 as a joint venture of two of the area’s top mechanical firms: Stigner Plumbing & Heating, Inc. and John R Holt, Inc.

On June 1, 2013, MSI purchased Du-Mont Company of Peoria, IL.  With this acquisition, MSI now has a sheet metal fabrication shop located in Peoria to go along with our already established process piping fabrication shop in Galesburg.

MSI is a full line, client-oriented mechanical contracting company that provides services to the residential, commercial and industrial markets.  MSI specializes in mechanical systems including plumbing, heating, ventilation, air conditioning, and electrical.  MSI provides service 24 hours a day.