About MWM

Our Story

Back in 1983, Dwayne Klarenbeek had a simple idea: treat people right, do quality work, and build something that lasts. He started Midwestern Mechanical out of a converted chicken coop in Larchwood, Iowa, with nothing but a toolbox, a truck, and a commitment to doing things the right way.

Forty-plus years later, that little plumbing company has grown into something pretty special. We’re now 330+ employees strong, 100% employee-owned, and operating out of four locations across South Dakota and Iowa. But here’s the thing—the heart of what we do hasn’t changed one bit. We still believe that every customer deserves to be treated like family, every job deserves our best effort, and every team member deserves to grow.

Why Folks Choose Us

We Show Up When You Need Us
24/7 emergency service isn’t just something we advertise—it’s a promise we keep. Middle of the night, holiday weekend, doesn’t matter. When you call, we answer.

We Know What We’re Doing
Largest non-union plumbing contractor in the region. Medical gas-certified for hospitals. Fire protection experts. HVAC specialists. If it keeps buildings running, we handle it.

We Treat You Like Family
No runaround, no surprises, no pressure. Just honest folks giving you straight answers and quality work you can count on.

We’re Invested in Our Community
100% employee-owned means every person on our team has skin in the game. We’re not going anywhere—this is our home too.

Our Four Locations

Sioux Falls, SD – Corporate Headquarters

Plumbing and Fire Protection Services

Our flagship location and where it all started (well, after the chicken coop). Complete design-build services, medical gas certification, 3D design and prefabrication capabilities. Serving the greater Sioux Falls area and everything within 1.5 hours.

Spencer, IA

Plumbing, HVAC and Fire Protection Services

Our Iowa home base, serving northwest Iowa and southwest Minnesota. Full-service capabilities with a team that knows the area inside and out.

Rapid City, SD

Plumbing and HVAC Services

Bringing our expertise to western South Dakota from our state-of-the-art facility. Complete plumbing and HVAC services for the Black Hills region.

Sioux City, IA

Plumbing and Fire Protection Services

Our commercial plumbing experts serving the tri-state area. Focused on large-scale commercial and industrial projects.

Growing Our Own

We’re home to one of the state’s largest apprenticeship programs, and we’re pretty proud of that. Every Friday afternoon during the school year, our apprentices gather for classroom instruction and hands-on training taught by our own journeymen. It’s a 4-year program that’s free to employees—we pay you to learn.

Why? Because we believe in growing our own experts. Most of our leadership started on the tools and worked their way up. That’s just how we do things around here.

Awards & Recognition

Industry Excellence

• Sioux Falls Development Foundation Workforce Development Recognition
• U.S. Department of Labor Apprenticeship Program Certification

Apprenticeship Program Recognition

• PHCC National Apprentice Competition Winners
• Recognized as “a model in workforce development” by the Sioux Falls Development Foundation
• U.S. Department of Labor-certified programs in plumbing, HVAC, and fire protection

Project Highlights

• Regional retail chains and convenience stores
• Healthcare facilities and medical centers
• Educational institutions and school districts
• Municipal and government buildings
• Commercial and industrial projects across four states

Employee Ownership Makes the Difference

In 2023, we became 100% employee-owned through an Employee Stock Ownership Program (ESOP). What does that mean? Every person on our team is now an owner in the company they help build every day.

It’s not just about the financial benefits (though those are nice). It’s about having a say in how we do business, knowing your work matters, and being part of something bigger than yourself. When you call Midwestern Mechanical, you’re talking to owners, not just employees.

Our Promise to You

Whether you’re dealing with a plumbing emergency, planning a major construction project, or thinking about joining our team, here’s what you can expect from us:

✓ Honest Communication: We’ll tell you what you need to know, not just what you want to hear
✓ Quality Work: We stand behind everything we do
✓ Fair Pricing: No surprises, no gotchas
✓ Reliable Service: We show up when we say we will
✓ Local Expertise: We know these communities because we live here too

That’s been our approach since 1983, and it’s what we’ll keep doing for the next 40 years.

Employee Owned