Brennan currently serves as Obama’s top counterterrorism adviser and is a 25-year CIA veteran. The nomination will be announced formally by the White House at an event on Monday afternoon. Brennan’s appointment must be confirmed by the Senate, BBC News reported.

During Monday’s event the President will also nominate Chuck Hagel as the next defense secretary.

The Associated Press reported that both Brennan and Hagel are controversial picks for a second-term national security team.

Brennan was considered for director of CIA in 2008, but he withdrew his name after questionsabout his connection to “enhanced interrogation techniques” during his time at the CIA were raised. Brennan spoke out against the tactics and denied any involvement.