COLUMBIA, Md.--(BUSINESS WIRE)--Merkle (www.merkleinc.com), a leading technology-enabled, data-driven customer relationship marketing (CRM) firm and the nation’s largest privately held agency, announced the appointment of John Padwick to vice president, Travel. In this role, Padwick will lead the growth efforts for Merkle’s Travel practice and will provide expertise in bringing innovative data, analytic and technical marketing solutions to top travel and hospitality clients. “Modern travel bran