Siddharth Banerjee, executive vice president, marketing, Voda­­fone, has joined Facebook’s India operations as director, Global Sales Organi­sation. In his new role, Banerjee will be responsible for partnering businesses for Facebook India and will lead agency relationships and verticals in his field. He was responsible for marketing and branding for Vodafone India, before the operator’s merger with Idea Cellular. Post the merger, he was reporting to Sashi Shankar of Idea Cellular.