The Senate confirmed Mark Bradley Childress, most recently President Obama’s deputy chief of staff for planning, to be the U.S. ambassador to Tanzania by voice vote Monday night.

Childress, who was profiled in May by Buzzfeed in an article titled, “Meet The Most Powerful Man In The White House You’ve Never Heard Of,” is a longtime Washington insider who was a close adviser to former senator and one time-majority leader Tom Daschle (D-S.D.). This fall, The Washington Post reported that Childress was among the top White House staffers warned about the potential risks of HealthCare.gov’s launch.

The Senate also confirmed unanimously two undersecretaries at the Homeland Security Department:

Francis Xavier Taylor, who has had a long career in national security, including counterterrorism and diplomatic security posts under President George W. Bush, to be undersecretary for intelligence and analysis.

L. Reginald Brothers, Jr., who was deputy assistant secretary of defense for research, to be undersecretary for science and technology.