Trident Maritime Systems on August 15 said it has agreed to acquire Callenberg Technology Group, a designer and integrator of infrastructure systems for commercial and government vessels worldwide.

Trident is paying $64 million for the acquisition, with $41 million in cash and the rest through a seller-financing package.

Trident is a portfolio company of the private equity firm J.F. Lehman & Company and Sweden-based Callenberg is part of Norway’s Wilhelmsen Maritime Services AS.

Callenberg designs, assembles, integrates and supports HVAC, electrical energy management, and insulation systems for passenger vessels, the offshore industry, naval and coast guards, oil and gas terminals, and liquefied gas tankers. The company’s government customers include the U.S. Navy, U.K. Navy, and Swedish coast guard.

Callenberg has about 900 employees in 14 countries.

U.S.-based Trident provides turnkey marine joiner, distributed, electro-mechanical, and power, propulsion and control systems and solutions for government and commercial customers in the U.S. and internationally.

“The addition of Callenberg adds a highly complementary set of systems and capabilities to the Trident platform which will ultimately allow us to better serve our customers,” Tom Eccles, Trident’s CEO, said in a statement. “This acquisition also significantly strengthens our presence internationally and improves our ability to support our global customers.”

The acquisition is expected to close during the third quarter of 2016.

Wilhelmsen’s financial adviser on the deal is SEB Corporate Finance.