Clark Letterman is senior survey manager for international research at Pew Research Center, working with project teams to manage international research projects.  Prior to joining the Center, Clark was a survey research scientist at RTI International, where he worked with clients and local research agencies to design and implement research projects across multiple countries in Asia, Africa, and Latin America.  His core areas of interest are data quality assessment and project management techniques for research projects in difficult environments.  He is a member of the American Association for Public Opinion Research (AAPOR) and the World Association for Public Opinion Research (WAPOR), and regularly presents at conferences.  Letterman received a masters degree in international studies from North Carolina State University.