The single biggest task for the European Central Bank (ECB) in 2014 will be the implementation of the banking union in the currency bloc, said Frédéric Oudéa, CEO of Société Générale.
"The first major objective is to implement the banking union. [The ECB] should not underestimate the operational challenge, which is to create a new regulator [and] recruit close to 1,000 people," Oudéa told CNBC late Tuesday.
"I'm very confident in Daniele Nouy, she's a very seasoned, experienced, talented regulator, so I think she will put in place something robust, but it's a big task," he said. Daniele Nouy, who has been the head of France's banking regulator, was appointed to head the euro zone's new banking supervisor last month.
(Read more: Europe's banking marriage needs 'hard work': Trichet)
In December, the European Union reached a long-awaited agreement on a mechanism to manage the closure of the region's failing banks.
The so-called single resolution mechanism, together with a bolstering of the ECB's supervisory powers and region-wide deposit insurance, makes up the European "banking union" – a deal that is expected to significantly reduce the need for tax-payer funded rescues of lenders.