Meet the team

The folks behind the breeze.

Keep calm and stay comfortable — that's the shirt, and that's the crew. Real neighbors who've been keeping this corner of Kansas comfortable since 2009.

The Mr. Breeze Heating & Cooling crew lined up in front of a Mr. Breeze trailer

The Mr. Breeze crew · Leavenworth, Kansas

Family owned & operated EPA-certified technicians Licensed, Insured & Bonded Mechanical Contractors

Brett W. Grossenburg

Founder & President

Brett started Mr. Breeze in October 2009 with one garage and one idea: that a heating and cooling company should be judged by whether its customers trust it. He had spent years in the trade through the 1990s and had seen what happens when contractors put sales ahead of the people they serve. For more than a year he ran the whole business himself out of his home on 13th Street in Leavenworth — answering the calls, meeting the homeowners, installing the systems. Today he leads our installation and comfort-advising work. The standard he set in that garage hasn't moved: if you don't have your customer's trust, you have nothing.

Zachary W. Grossenburg

General Manager

Zack joined Mr. Breeze in 2011 as an installation helper and has since worked nearly every seat in the company — installation, service, sales, customer relations, and operations. He has been General Manager since 2020, running scheduling, the field departments, hiring, and day-to-day operations. He holds HVAC Mechanical Master and Plumbing Master licenses, EPA 608 certification, and Daikin DCP credentials, so the person managing your job has done the work himself. Raised in the Lansing and Leavenworth area, he's also the one accountable when something needs to be made right.

Rachel Mims

Office Manager & Dispatch Lead

Rachel runs the office and the dispatch board. If you've called Mr. Breeze, there's a good chance she's the one who answered, found you a slot, and pointed a technician at your address. She also handles permits with the cities we work in — Leavenworth, Lansing, Basehor, Bonner Springs, and Johnson County — so inspections get scheduled and closed out properly.

Want to be in this photo?

We're always looking for good people who take pride in their craft.

See Open Roles

Want the crew at your place instead? Call (913) 651-7769.

Let's get comfortable.

Neighbors answer our phones 24 hours a day — yes, really. Give us a call, or send your details and we'll ring you right back.

Mon–Fri: 8 AM–4 PM CST · Answering calls 24/7

4.8 · 600 Google reviews Licensed, Insured & Bonded Mechanical Contractors EPA-certified Serving the KC metro since 2009

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