Hyatt has appointed PHD to handle digital media planning and buying globally, following a competitive pitch.
The scope of work will include SEM, SEO, social and display and the account will be led out of the US with a focus on key markets, particularly in Asia.
The review comes as more and more consumers turn to the internet on multiple devices to research, plan and book their travel.
PHD's ability to provide a global infrastructure with local relevance and local, direct support was a factor in the agency's appointment.
Mike Cooper, global CEO of PHD said the agency has enjoyed a successful partnership with Hyatt since being appointed agency of record in North America in 2008.
"We're delighted to be growing this relationship on a global scale thanks to our localized expertise across key markets. It's testament to PHD's search and social capabilities."
In 2010 there were 17 Hyatt properties in China, more than in any other country outside the US. In 2011 Hyatt opened four more properties and have another nine scheduled for 2012. In May 2011, Hyatt announced plans to build 30 hotels in India over the next five years.