RAPAPORT... Sotheby's has divided the responsibilities of its chief operating officer, hiring two new executives to replace the departing Adam Chinn.The auction house has appointed John Cahill (pictured, above), a founding partner of art-law firm Cahill Cossu Noh & Robinson, and former general counsel at Phillips, as executive vice president and chief commercial officer. He will be responsible for overseeing the auction house's global deals with clients, as well as its financial-lending services, Sotheby's said last week.Additionally, Ken Citron (right), former chief operating officer at Christie's, will join Sotheby's as executive vice president of operations and chief transformation officer. In his role, he will drive performance improvement across all the company's operations, including logistics, services and technology. Cahill and Citron will take up their new positions in January. Chinn, who has been chief operating officer since February 2017, will leave Sotheby's at the end of this year. Image: John Cahill (above) and Ken Citron (below). (Sotheby's)