Rep. Marjorie Taylor Greene, R-Ga., has been tapped to lead a new House subcommittee that will work with the so-called Department of Government Efficiency led by Elon Musk and Vivek Ramaswamy.

Greene and House Oversight Chairman James Comer, R-Ky., have met with Ramaswamy and his team and are "already working together," a person familiar with the matter told CNBC on Thursday.