Paul Jacobs has joined the board of Dropbox, the San Francisco file hosting service announced in a blog post on May 2.

Jacobs, 53, is executive chairman of Qualcomm Inc. He was Qualcomm’s CEO from 2005 to 2014.

“We admire Paul’s accomplishments and tenacity,” Dropbox co-founder and CEO Drew Houston said in the blog post. “During his tenure as CEO, Paul successfully challenged big, established companies time and again,” Houston wrote, adding that Jacobs will help his company expand further.

Jacobs holds a doctorate in electrical engineering from the University of California, Berkeley.