After 40 years at Comerica Bank in Dallas, John Killian announced his retirement effective next May.

Killian has been the $65 billion-asset Comerica's chief credit officer since 2010. Previously, Killian served nearly eight years as executive vice president of corporate credit policy where he was responsible for the bank's special assets groups nationwide. In addition, Killian has held a variety of other positions in both lending and credit management lines of business, the company said in a Wednesday news release.

"John has been an invaluable member of our management team and helped guide our bank through the economic challenges of the past several years," said Ralph Babb Jr., chairman and chief executive.

Peter Guilfoile, national credit administration manager, will assume the role of chief credit officer starting on Feb. 1. Guilfoile will also become a member of the company's management policy committee.

Guilfoile started working at Comerica in 1983 and has held several titles, including alternate credit administration officer and group manager for middle market banking; divisional credit administration officer for national business finance; and chief credit officer for the California market.

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