Exit Stage Left For JPMorgan CIO Chiarello

A spokesperson within the bank later confirmed the news to Waters, saying Chiarello was "ready for a new challenge."

He had been with the company since November 2007 and became global CIO in 2008. Some of his most significant technology challenges came in that first year, when JPMorgan bought Bear Stearns and Washington Mutual and absorbed their technology and customer accounts. In a 2010 interview with Waters, Carlos Hernandez, at the time the bank's global head of equities, likened the process to changing a tire at 75 miles per hour.

Mike Ashworth, the head of global technology infrastructure, will assume CIO duties on an interim basis. The bank spokespersoin said a search for a permanent replacement is already underway. JPMorgan operates an $8 billion annual technology budget with 20,000 global employees.

Chiarello, who previously served as head of technology at Morgan Stanley, had recently been focusing on big data aggregation and analysis.

He said in an email to the Wall Street Journal that his decision is not related to the recent executive departures that stemmed from the London whale trading losses of $6.2 billion.

Chiarello, who previously served as head of technology at Morgan Stanley, had recently been focusing on big data aggregation and analysis.