Kristen Blum, chief technology officer and executive vice president of J.C. Penney Co. Inc., has resigned.

She had been responsible for the retailer’s business and information technology systems.

Prior to joining Penney’s in January 2012, Blum was with PepsiCo as senior vice president and chief information officer of enterprise transformation. Earlier she was Abercrombie & Fitch Co.’s senior vice president and chief information officer, and before that served as Apple Inc.’s director of supply chain solutions and international retail.

A Penney’s spokesman confirmed Blum’s departure Thursday. He said that a successor hasn’t been named yet. Scott Laverty, senior vice president, business solutions, will assume the responsibilities of chief technology officer while the company searches for a replacement.

Blum couldn’t be reached for comment on her plans.