M&T Bank in Buffalo, N.Y., announced that Mark Czarnecki, its president and chief operating officer, has died.

Czarnecki, 61, died Sunday from “an extended illness” the $123 billion-asset company said in a press release. He worked for M&T Bank for 40 years, joining the bank as an assistant branch manager.

Czarnecki, who was on M&T’s board, was named president in 2007 and chief operating officer in 2014.

Mark Czarnecki, M&T's president and chief operating officer, died Sunday after an extended illness.

“Through his career — and throughout his life — Mark distinguished himself as a leader and a servant of others,” Robert Wilmers, M&T’s chairman and CEO, said in the release. “His leadership and his service will be missed greatly — by his family, his colleagues, and his community.”

The company did not immediately announce a successor.

M&T has lost more than one leader in recent years.

Two directors, Patrick Hodgson and Robert King, died last year. Michael Pinto, who had been M&T’s vice chairman, died in 2014.

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