Beraud arrives at PepsiCo after spending the last 13 years at Limited Brands, where she was most recently chief marketing officer of Victoria's Secret.
At PepsiCo she will direct global marketing strategies for all its brands, including Pepsi, Frito Lay, Tropicana, Quaker and Gatorade, reporting directly to CEO Indra Nooyi.
Nooyi, in a statement, said: "We have some of the world's strongest brands and some of the world's greatest marketers, but never have we integrated our marking efforts in a holistic, global and disciplined fashion across the PepsiCo enterprise."
Prior to her role at Victoria's Secret, Beraud was credited with turning around stalling retail growth of Bath & Body Works by launching of the Express fashion line. She also spent five years in brand management at Procter & Gamble earlier in her career.
PepsiCo recently announced major investments into a number of global markets, including $3bn (£2bn) in Mexico, $1bn (£700,000) in China and $500m (£345m) in India.
In October, PepsiCo announced a $1.2bn (£825m) three-year investment to resuscitate flagging sales in North America, leading to speculation that BBDO's grip on the soft drink company's account was in doubt.
In November, this led PepsiCo to move its $60m (£40m) US creative account to TBWA\Chiat\Day, best known for its work revitalising Apple with its Mac v PC and iPod dancers campaigns.