Randall Schriver, the assistant secretary of defense for Asian and Pacific security affairs, will be leaving his post this month, according to chief Pentagon spokesman Johnathan Hoffman.
Hoffman said Schriver wanted to spend more time with family.
Schriver, who has served in the job since January 2018, will be the latest in a series of senior-level departures from the Defense Department's civilian policy shop run by Under Secretary John Rood, which has yet to replace David Trachtenberg, Rood's former deputy who resigned in July, and Robert Karem, who left his post as the assistant secretary of defense for international security affairs in October.
Additionally, in November, Mark Mitchell resigned as acting assistant defense secretary for special operations and low-intensity conflict. He succeeded Owen West, who resigned after 18 months on the job.
In May, Schriver warned U.S. companies about the risks of doing business with the Chinese government or entities backed by Beijing amid the onset of new U.S. supply chain security initiatives.
"Should those companies have an interest in doing business with the United States Department of Defense to be part of the defense industrial base, understand that there may be potential trade-offs," he said. "Starting from a position of awareness gives private companies who can make their own decisions the ability to balance the pros and cons."