The selections of Moniz and McCarthy will round out Obama’s second-term energy and environment team, following his nomination last month of Sally Jewell to head the Interior Department.
McCarthy, currently the EPA’s assistant administrator for air and radiation, would be replacing former EPA Administrator Lisa Jackson, who left the agency in February.
Moniz, Obama’s Energy pick, is a physicist at the Massachusetts Institute of Technology, where he directs the MIT Energy Initiative. He has long been seen as the front-runner to replace outgoing Energy Secretary Steven Chu.
Green groups are putting pressure on Obama to do more to confront global warming, and in Congress, Republicans are vowing to push back against environmental regulations they say are burdensome to business.
Read more on The Hill's E-2 Wire.