Timothy Barbari, director of the Science, Technology and International Affairs program in the School of Foreign Service, will leave Georgetown at the end of the semester to become associate provost for graduate affairs at Boston University.

Barbari, formerly dean of Georgetown’s Graduate School of Arts and Sciences, will be replaced by Timothy Beach, the Cinco Hermanos chair in environment and international affairs, on July 1. Beach previously served as director of the STIA program from 2009 to 2010 and also served as director for Georgetown’s Center for the Environment from 1999 to 2007.

Beach joined the STIA program when he arrived at Georgetown in 1993. He is currently the only tenured member of the STIA faculty.

Beach plans to expand the number of faculty in the program to improve its student-faculty ratio.

“We hope to add more people in the future because we have a large program with a small number of faculty members,” he said.

Beach hopes that this will, in turn, help the program expand.

“We would like to be able to grow,” he said. “We think that the topics that we deal with are completely germane to the SFS and the university at this time.”

Beach’s appointment was announced in an email sent by SFS Dean Carol Lancaster to all SFSstudents Monday afternoon.

“He has provided superb leadership for both programs in the past and I am sure will do so again in the future,” Lancaster wrote. “I join my colleagues in expressing our gratitude and best wishes to bothTims in their new ventures.”