Mayor-elect Zohran Mamdani is set to name Lillian Bonsignore as FDNY commissioner at a Tuesday afternoon news conference, sources told CBS News New York.

Bonsignore, a 31-year FDNY veteran who retired in 2022, will become the first openly gay and second woman commissioner in the department’s history. She will assume the top spot in the department following Mamdani’s inauguration on Jan. 1.

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Lillian Bonsignore

Dimitrios Kambouris/Getty Images for Empire State Realty Trust, Inc.

Bonsignore made similar history back in 2019 when she was sworn in as the first openly gay Chief of EMS for the FDNY.

The news comes on the same day outgoing Mayor Eric Adams named First Deputy Commissioner Mark Guerra as fire commissioner. Guerra will serve in that capacity until Bonsignore takes over under Mamdani.

Guerra replaces FDNY Commissioner Robert Tucker, who resigned after Mamdani was elected.

Please stay with CBS News New York for more on this developing story.