Former Xandr CEO Brian Lesser joins start-up building data 'bunkers' to preserve online privacy

Brian Lesser Adam Galica | CNBC Former AT&T executive Brian Lesser, who resigned as CEO of the company’s advertising unit Xandr earlier this year, has been named executive chairman of data start-up InfoSum. Lesser, who joined InfoSum’s board in April, is a longtime advertising industry executive. Before leading Xandr, he was chief executive of WPP‘s media