The private equity firm Brightstar Capital Partners on Wednesday said its portfolio company ERC, LLC, has agreed to acquire Oasis Systems, LLC, in a deal that adds significant scale, technology expertise and customers in the federal space.

Terms of the deal, which is expected to close during the second quarter, were not disclosed.

ERC, which is based in Alabama and acquired by Brightstar in 2021 in partnership with the company’s owner and senior management, provides engineering and consulting services to the Army, Air Force, Missile Defense Agency (MDA), NASA and other government agencies.

ERC had about 2,200 employees when it was acquired by Brightstar. Once combined with Oasis, the new company will be called ERC-Oasis and will have about 3,500 employees.

The combined company will provide life-cycle solutions in the areas of agile software development, cybersecurity, emerging technologies, information technology, mission support, modeling and simulation, systems engineering, and research, development, test and evaluation.

Oasis, which is based in Massachusetts, provides engineering and advisory services and has capabilities in systems engineering, enterprise systems, cybersecurity and information technology, professional services and human factors engineering. The company supports the Air Force on logistics and cyber warfare programs, and other customers include the Navy, Federal Aviation Administration, Army, MDA, NASA, the Defense Information Systems Agency and others.

Once the acquisition closes, Tom Colatosti, chair of Oasis, will become chair and CEO of ERC-Oasis. Tom Nickerson, CEO of Oasis, will be chief operating officer of ERC-Oasis. The company will continue to operate out of Alabama and Massachusetts.

ERC’s financial adviser on the deal is Houlihan Lokey. Oasis is being advised by Rothschild & Co.