Steve Bannon, President Donald Trump’s chief strategist, was removed from the principals committee.
Perry, who served as Texas governor from 2000 to 2015, was confirmed as energy secretary in March.
The change emerged in a memo made public on the federal register on Wednesday.
Adding Perry to the NSC’s principals committee now brings the cabinet official in charge of the nation’s nuclear stockpile into the fold. The lion’s share of the Energy Department’s budget goes toward the National Nuclear Security Administration, which deals with the military application of nuclear science.