About Us 2018-02-04T03:30:38+00:00

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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.

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.