Upper Allen Township -based Select Medical Holdings Corporation, which has medical facilities across the country, has announced the appointment of a new chief executive officer.

Thomas P. Mullin was named CEO of Select Medical, replacing David S. Chernow, who has held the position since 2014.

Mullin joined Select Medical in 2008, most recently serving as co-president, overseeing 140 critical illness recovery and inpatient rehabilitation hospitals.

Mullin previously served as executive vice president from 2020 to 2023, president of specialty hospitals from 2018 to 2020, and chief operating officer of specialty hospitals from 2016 to 2018.

Prior to his divisional appointments, Mullin held a variety of leadership positions in the company’s Critical Illness Recovery Hospital Division, inc

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