Defense-aerospace platform ETI Mission Controls LLC, a Simon Group Holdings portfolio company, purchased Starwin Industries Inc. for an undisclosed amount.

Starwin Industries manufactures 250 components and assemblies for military aircraft, naval vessels and support equipment.

It will become the sister company of ETI Tech, a supplier for the fixed- and rotary-wing military aircraft industry.

Rick Little, an executive at Starwin Industries, will continue as president of Starwin Industries.

The Birmingham, Mich.-based private equity firm invests in enterprises with a focus on energy solutions, fuel supply, oilfield services, logistics and transportation, real estate, private equity, technology incubation, aerospace and defense, and modular solutions sectors.