ERwin Inc., a Tampa, Florida, software company recently sold by CA Technologies Inc. to a private equity firm, plans to open executive offices on Long Island, the company’s new chief executive said Wednesday.

Parallax Capital Partners, based in Laguna Hills, California, purchased ERwin from CA in March but announced the deal Wednesday. Financial terms were not disclosed.

CA, which is headquartered in Manhattan and has roots on Long Island, did not break out the financials of its ERwin unit. CA had acquired the business in 1999 as part of a $3.5 billion deal for Platinum Technology. On its website Parallax said it invests in companies with revenues of $5 million to $100 million.

ERwin’s new chief executive, Adam Famularo, a former CA executive who served through March as head of global channels at Verizon Enterprise Solutions, said he is scouting Melville and other locations for an executive headquarters.

Famularo, who lives in Garden City, said ERwin currently has about 25 employees in Tampa plus developers in China and India, and he expects to have a head count of about 100 within the next year, including five to 10 in the Long Island headquarters.

ERwin’s software is used in database modeling, a process that Famularo likens to when an architect creates a miniature model of a house before designing the full-size version. The company sells through partners such as Holbrook- based Future Tech Enterprise Inc., which integrates hardware and software for corporate clients.

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ERwin has plans to expand beyond the $120 million data- modeling market and enter the multibillion-dollar data management market, Famularo said.

“Our goal is to play into a greater addressable market,” he said. “ERwin is the beginning.” Famularo said he expects to acquire three or four more data-management software companies over the next 12 to 18 months.

“With our acquisition of the industry leader in data modeling, we plan to enhance the value of the ERwin brand and its award-winning solutions, partners and people to the benefit of the overall market,” Jim McGarry, operating partner at Parallax, said in a statement.