De Guindos has been Spain's top economy official since late 2011 and has been credited with helping to steer the eurozone's fourth-largest economy back to health following the bursting of a property bubble that triggered worries over the country's banking sector and contributed to a skyrocketing in unemployment. He said Monday he plans to resign as Spain's economy minister "in the next few days." His appointment will plug a Spanish gap at the top of the European Union's institutions. No Spanish official holds any other senior EU post. Spain has also been absent from the ECB board for almost six years.