Dive summary: 

• Twitter's new sales director of central U.S., Brad Keown, was plucked from an unlikely place, Facebook. 
• Keown was at Facebook for nearly six years and oversaw the relationship with Omnicom agencices worldwide. 
• Twitter has hired very few employees from Facebook at the executive level; the social network has been more successful recruiting employees from Google including Matt Derella, director of agency and brand strategy; Richard Alfonsi, VP-global SMB and mid-market sales; Bruce Daisley, U.K. sales director (formerly of YouTube); and Stephen McIntyre, director of European mid-market sales.

From the article: 

"Based in Chicago, Mr. Keown will focus on large brands (the likes of P&G and various automakers are in his territory) and report to Twitter's head of revenue Adam Bain. At Facebook, he reported to VP-global partnerships Blake Chandlee. He's stepping into a role previously occupied by Brent Hill, a former Google executive who joined a venture-capital firm, Origin Ventures, in January."