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About Us

With over 85 years of HVAC and mechanical services experience, Illingworth-Kilgust Mechanical provides clients statewide with the total mechanical solutions they need to meet their facilities' full lifecycle requirements. Learn about us.


By integrating our strengths, we can offer a wider range of mechanical construction expertise and a broader array of commercial heating and cooling, plumbing systems, building automation systems design/build, and facilities services to more clients across Wisconsin than ever before.
Learn more.

Meet the Team

Dan Pfeifer, President of Illingworth-Kilgust Mechanical Dan Pfeifer, President, is just one of the many people that deliver high performance projects that meet our clients most exacting standards.

Meet the rest of the team.