The company that bought the Twinkie, HoHo and Ding Dong brands out of bankruptcy is gearing up to reopen plants and hire workers, but it won’t be using union labor.

Hostess Brands — Metropoulos & Co. and Apollo Global Management's APO -0.58% new incarnation of the baking company that liquidated in Chapter 11 — is reopening four bakeries in the next eight to 10 weeks, aiming to get Twinkie-deprived consumers the classic snack cake starting in July.

Chief Executive C. Dean Metropoulos said the company will pump $60 million in capital investments into the plants between now and September and aims to hire at least 1,500 workers. But they won’t be represented by unions, including the one whose nationwide strike sparked the 86-year-old company’s decision to shut down in November.