Siddharth Banerjee, Vodafone EVP Marketing, has joined Facebook's India operations as Director- Global Sales Organization (GSO). Banerjee's move will be one of the first big exits from the newly formed Vodafone Idea. Before the merger with Idea Cellular, Banerjee was responsible for marketing and branding for Vodafone India and, after the merger, reported to Shashi Shankar of Idea Cellular. In his new role, Banerjee will be responsible for partnering businesses for Facebook India and will lead agency relationships and verticals in his field.