Ehren succeeds David Camp, who will continue to provide support through a consulting role for the next year, according to a news release.
Ehren joined the company as senior vice president and chief financial officer in 2008.
In 2010 he was named senior vice president of global operations, and in 2011 he also assumed the role of executive vice president and chief operating officer.
“He has broad operating experience and a deep understanding of the industry and our business,” Camp said in the release. “His passion for the company and its customers and his vision for Key’s future make him an ideal choice going forward.”