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Air Masters Corporation hires Mark Trojahn, employees of Trojahn Plumbing

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Air Masters logo.

St. Louis, Mo. – Air Masters Corporation, a full-service HVAC, plumbing, piping, and building automation/energy conservation firm, hired Mark Trojahn and the 13 employees of Trojahn Plumbing Systems. 

“We are pleased to bring Mark Trojahn’s many years of experience to our plumbing operations. Mark's experience with large projects and his design/build capabilities uniquely meld with our existing expertise,” said Malcolm Sweet, general manager at Air Masters. “Overnight, we have doubled our plumbing department and look forward to future growth.”

The former Trojahn employees bring special expertise in design/build, hotel, university and multi-family residential, long-term care and other multi-unit projects. 

“We’re excited to be part of a full-service contractor that provides a wide array of services,” said Trojahn. “We also bring a new range of capabilities to Air Masters, to better serve our clients.”

Mark Trojahn was the fourth-generation owner of Trojahn Plumbing, which was founded in 1927. Recent Trojahn projects included Bissinger’s Chocolate Factory, Mercy Hospital Patient Tower B and the Park East Tower in St. Louis’ Central West End.

Air Masters serves clients in Missouri and Illinois, with offices in St. Louis, Columbia and Rolla. For more information, call (636) 680-2100 and visit and

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