ack Poulson worked for Google's research and machine intelligence department, where he was focused on improving the accuracy of the company's search systems.

In early August, Poulson raised concerns with his managers at Google after The Intercept revealed that the internet giant was secretly developing a Chinese search app for Android devices. The search system, code-named Dragonfly, was designed to remove content that China's authoritarian government views as sensitive, such as information about political dissidents, free speech, democracy, human rights, and peaceful protest.

After entering into discussions with his bosses, Poulson decided in mid-August that he could no longer work for Google. He tendered his resignation and his last day at the company was August  31.