Jake Sullivan has been picked President-elect Joe Biden's national security adviser by Biden-Harris presidential transition team.
"President-elect Biden taught me what it takes to safeguard our national security at the highest levels of our government. Now, he has asked me to serve as his National Security Advisor," Sullivan tweeted. "In service, I will do everything in my power to keep our country safe."
A loyal follower of Biden, he had served as deputy assistant to the President and national security advisor to Biden during Obama's administration.
He had also worked as chief foreign policy advisor to Hillary Clinton during the 2016 presidential campaign.
A visiting professor at Yale Law School where he also completed his J.D., Sullivan also holds a master of philosophy in international relations from Oxford.
He also co-founded National Security Action, a nonprofit national security advocacy organization, in February 2018.
Interestingly, its mission, as mentioned in their website, is to oppose "the reckless policies of the Trump administration that endanger our national security and undermine U.S. strength in the world."