Comerica Inc., Detroit, promoted five vice presidents to senior vice president:

Cheryl A. Derezinski, in charge of retirement services.

Marvin J. Elenbaas, controller and chief accounting officer.

John R. Irwin, president of Comerica Securities, where he manages the sale of investment products.

David L. Littmann, in charge of the economics department and research library.

Michael H. Michalak, in charge of corporate planning and development, which includes coordinating mergers and acquisitions.

Comerica also promoted Gary W. Orr, a senior vice president and credit manager in its Texas subsidiary, to executive vice president and chief credit officer of Comerica Bank Texas.

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