CWT and Amex vet Andrew Winterton joined Certares,

which leads an investor group that owns 50 percent of American Express Global Business Travel, confirmed an Amex spokesperson. "We believe his expertise will be valuable to our overall expansion plans," the spokesperson added. Winterton joins Certares as senior operating partner, according to his LinkedIn profile. Winterton worked for American Express for nine years in senior positions related to distribution, supplier relations and Latin America. He then served from 2009 to 2012 as Carlson Wagonlit Travel's president for suppliers, products and technology.