The Waldinger Corporation Acquires Summit Electric, Inc., in St. Louis, Missouri

June 12, 2025

DES MOINES, Iowa (June 12, 2025) -- The Waldinger Corporation is thrilled to announce it has acquired Summit Electric, Inc., a leading electrical service contractor in St. Louis, Missouri. Founded in 2008 by Doug and Tammy Heidland, Summit Electric performs electrical service and project work throughout the St. Louis metro area.

“I’m excited to welcome the talented team from Summit Electric to Waldinger,” said Derek Hileman, President of Waldinger Service. “Doug and Tammy have built a strong business with a reputation for delivering tremendous value to their clients. Adding their team’s electrical capabilities to our St. Louis branch gives us the ability to offer premier mechanical, electrical, and plumbing service capabilities to clients throughout the St. Louis metro area.”

All nine Summit Electric team members will be retained as part of this acquisition, including both Doug and Tammy. With this this acquisition, Waldinger adds electrical contracting and service capabilities to its St. Louis branch, in addition to HVAC/R, plumbing, and rack refrigeration service.

“Tammy and I are excited to join the Waldinger team and start this new chapter in our careers together,” said Doug Heidland. “Waldinger shares our commitment to delivering value to our clients and taking care of our people. We fully expect that joining forces with Waldinger will lead to greater opportunities for our people and our clients.”

This is The Waldinger Corporation’s third acquisition in 2025. In January, the company announced it had acquired Trinity Electric Company in Springfield, Missouri, and in May it added a new branch location in Fort Wayne, Indiana, via the acquisition of Project Design and Piping.

About The Waldinger Corporation

Founded in 1906 and headquartered in Des Moines, Iowa, The Waldinger Corporation is a premier full-service mechanical, electrical and sheet metal contractor. We design, fabricate, install, maintain, and repair HVAC, refrigeration, electrical, plumbing, piping, and kitchen equipment systems for commercial, institutional, and industrial facility clients.