Mark A. Frey has been named president and chief executive officer of the Alexian Brothers Health System. He succeeds Brother Thomas Keusenkothen, C.F.A., who retired from the position on December 1, 2011.

An Alexian Brother Health System employee for more than 25 years, Frey previously served as president and chief executive officer of Alexian Brothers Behavioral Health Hospital, chief executive officer of Alexian Rehabilitation Hospital, and vice president of the Alexian Brothers Health System Neurosciences Institute.