Muskego, WI — November 18, 2025 – J.M. Grimstad Inc., an Employee Stock Ownership Plan (ESOP) company and a leader in fluid power and control systems integration, has acquired GT Hydraulic Specialists, a premier hydraulic service provider with a strong presence in the Great Lakes marine and industrial markets.
This acquisition strengthens J.M. Grimstad’s ability to deliver complete lifecycle solutions by combining GT Hydraulic Specialists’ field service, installation, and maintenance expertise with J.M. Grimstad’s engineering, integration, and manufacturing capabilities. It also builds on the foundation established with J.M. Grimstad’s acquisition of Galland Henning earlier this year, further expanding the company’s reach across multiple industries.
With GT Hydraulic Specialists joining the J.M. Grimstad family, customers will benefit from a fully integrated offering of services. Customers will gain access to J.M. Grimstad’s engineering and controls expertise, warehousing, hose and manifold shops, and extensive inventory resources—ensuring faster service, enhanced project support, and advanced replacement system design. GT Hydraulic Specialists also brings ownership of the Collomatic winch line—a specialized winch used on Great Lakes ships—for which J.M. Grimstad can now offer both new units and rebuild services, adding unique value for regional maritime customers.
J.M. Grimstad and Galland Henning customers will now enjoy expanded on-site installation, repair, and preventative maintenance services. Together, the companies provide a single-source partner offering design, build, and field support solutions for marine, industrial, and manufacturing applications. The integration also creates meaningful synergies across J.M. Grimstad, GT Hydraulic Specialists, and Galland Henning. By aligning supply chain resources, engineering teams, panel shops, hydraulic builds, and service capabilities, the companies are positioned to increase efficiency, expand into new markets, and deliver stronger customer value.
“This acquisition is a win for all of our customers,” said Brian Sternberg, President and CEO of J.M. Grimstad. “With GT Hydraulic Specialists’ service expertise, Galland Henning’s manufacturing excellence, and the dedication of our employee-owners, we are creating a truly comprehensive solution that supports every client we serve across design, build, and field service.”
