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Committed to making high quality composite parts from low cost tooling… Accelerating Innovation.

In the late 1960’s, Dave Mohnke was working at Eaton Model and Pattern as the GM. He believed there was a way to serve customers who needed high-quality composite parts, but didn’t have the typical tooling budget to produce those parts.

So in 1970, Dave founded E-T-M Enterprises in a 6,000 square foot building in Grand Ledge, Michigan. And from the beginning, as our name suggests, our focus was Engineering, Tooling, and Manufacturing.

In the early years, Dave and his team perfected a process known as “cold molding” to produce composite parts using low temperature and low pressure.

Over 45 years later, Dave’s son, Steve is the President and innovation, high quality, and low cost are still hallmarks of ETM.

Located in Grand Ledge, but now in 180,000 square feet of manufacturing space on an 18-acre site. Our in-house tooling shop is just 2 blocks away in a 12,000 square foot building that also has 18,000 square feet of storage for customer molds, fixtures, and master models.

Jim Sundstrom The Sales Guy Started working at ETM in 2007. I enjoy helping our customers with their composite challenges. When I am not working, I enjoy remodeling projects, officiating boy’s lacrosse and football. Troy Ward Operations Manager I started working at ETM in 2009 as the Materials Manager. I am now responsible for the Manufacturing Department and the Materials Department at ETM as the Operations Manager. When I am not working, I enjoy being outside with my family camping, backpacking, hunting, and fishing. I am passionate fan of the Detroit Tigers, Redwings, and the Lions and I am a proud Central Michigan University Alumni Mike Buter Purchasing I’ve been with ETM since 2015. I enjoy working directly with suppliers to strengthen existing relationships as well as build new ones. These relationships help with the continued growth of our company. In my spare time I like to hunt, fish, and enjoy the outdoors. Steve Mohnke The Guy in the Corner Office Since joining ETM as a 4-year old I have worked in several areas of manufacturing, tooling, and administration. We strive each day to exceed our Customer’s needs, maintain a high level of quality and delivery, and provide positive and innovative solutions for the composite industry we operate within. Mark Wyatt HR Manager I began working in the Human Resources Department in 2012. As HR Manager I really enjoy taking on the new challenges my role presents me every day, but I truly love getting out from behind my desk and interacting with our employees on a daily basis. When I’m not working, I enjoy spending time with my wife and daughter, hunting, fishing, honing my BBQ skills, and serving the city of Potterville as a volunteer firefighter. Kevin Weichbrodt Account Manager I have been with ETM since 2004. I live and work in the Pacific Northwest and manage our interaction with customers that are based in this area. I have an engineering background and work in a sales capacity to ensure that we serve our customers as efficiently as possible. I love almost any kind of outdoor activity and whether it’s winter or summer, the NW has a lot to offer an outdoor enthusiast such as myself.

Our Employees Agree

“We strive each day to exceed our Customer’s needs, maintain a high level of quality and delivery, and provide positive and innovative solutions for the composite industry we operate within.”


“ETM is a family style company with great people and truly a wonderful place to work.”


Our Core Values

Through Teamwork we will create an environment which promotes long-term relationships and maximizes benefits for the Customers, Employees, Suppliers, Financial Backers, Stakeholders, and Community.