Union Community Bank in Mount Joy, Pa., will promote its chief operating officer to lead the bank, after the retirement of its longtime president and chief executive.

The $509 million-asset thrift will name Gregory Diehl to the positions on Dec. 31, when Mark Gainer will retire. Gainer has worked for Union since 1976 and has been president and CEO since 1999, according to LancasterOnline.

Diehl has worked for Union since 2003. Union will not name a chief operating officer to succeed Diehl. Instead, it will split his responsibilities among different employees.

Union, which was established in 2000, has 14 branches in Lancaster County, Pa.

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