A Westbury aircraft parts manufacturer is expected to close its doors by August, laying off all 90 employees, company filings show.

Triumph Structures Long Island LLC will be laying off workers from Jan. 15 through Aug. 15, when the plant will close, according to a Worker Adjustment and Retraining Notification Act notice posted Monday on the New York State Labor Department’s website.

The company is consolidating operations, the notice stated. The filing didn’t indicate whether employees would be offered jobs in other operations at the company.

The closure is part of an effort to “position the company for long-term success and enhance the company’s performance and competitiveness in the marketplace,” the plant’s Berwyn, Pennsylvania parent company, Triumph Group Inc., said in a statement.

The Nassau County Industrial Development Agency is in discussions with Triumph in an effort to persuade the company to keep the facility open, the agency’s executive director, Joseph J. Kearney, said Thursday.

The agency struck a deal granting Triumph tax breaks in 2006. The company was in compliance with the requirements of that agreement when it filed its most recent annual report in December 2015, Kearney said. At the time, the company had 120 employees, he said.

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Triumph could not be immediately reached for comment about discussions with the IDA.

In a filing Monday with the Securities and Exchange Commission, Triumph Group said it was “transitioning the work being done at its facility in Westbury, New York to other Triumph Precision Components facilities.”

The company also is closing a plant in Pennsylvania and one in Washington state, and it is consolidating three plants into one facility in Connecticut, Triumph Group said in its statement this week.

Under New York State’s WARN Act, companies with at least 50 full-time employees must give them at least a 90-day notice of a mass layoff or closing.

The Westbury plant was featured in Newsday in 2013, when employees volunteered to help redesign Nassau Haven, a teen shelter in Wantagh.