Samsung Mobile’s chief product and technology officer Omar Khan announced on Monday that he is departing the company to take up a post in the mobile division of Citigroup. There, Khan will work on the bank’s global mobile solutions. Khan’s role at Samsung was to plan, market and manage new products, content and services. He was a staple at most Samsung press conferences, where he introduced new products such as the original Galaxy S line, the Infuse 4G, Galaxy Tab, and more. Nick Dicarlo, vice president of portfolio planning and product marketing, and Gavin Kim, vice president of content, data services, and enterprise Mobility will remain on board at Samsung Mobile and will be “assuming most of the product and service spokesperson responsibilities for Samsung Mobile,” Khan said.