A rock-solid foundation for your project—any size, any place. Expert prep and pour for performance you can count on.

End-to-end mechanical installations, delivering the systems you need and the above-and-beyond service you deserve.

In-house design-assist services lower costs, boost constructability, and reduce overall schedules for success from the very start.

Decades of experience with the most demanding equipment challenges means we get the job done—and we mean the whole job.

Specializing in complete single-source piping solutions that achieve optimal results. You name it, we build it.

Sophisticated, not complicated, for peak performance at any scale. Proven processes keep your projects on track.

Powering innovation and infrastructure for every industry. Specialized systems you can rely on for the long haul.

Harder's sheet metal division provides complete HVAC and industrial duct fabrication and installation for all major industries.

Prefabrication reduces downtime and labor costs while minimizing the impact on your operations, no matter where you’re located.

Strong, safe, secure—infrastructure that holds to the highest standards. Discover workmanship backed by 80 years of experience.

Smooth, disruption-free service for every phase of your project. Our expertise guarantees safety and success.

State-of-the-art tech for designs that deliver. We combine leading-edge tools with decades of experience to envision and execute with excellence.