Neil Chatterjee has been sworn in as the newest commissioner at the Federal Energy Regulatory Commission, a spokeswoman for the agency said in an Aug. 8 email.

Chatterjee, a former energy adviser to Senate Majority Leader Mitch McConnell, R-Ky., joins Acting Chair Cheryl LaFleur at FERC, which has five commissioners when full.

The Senate on Aug. 3 voted to confirm Chatterjee and Robert Powelson, a member of the Pennsylvania Public Utility Commission and president of the National Association of Regulatory Utility Commissioners.

FERC has been without a three-member quorum since early February when former Chairman Norman Bay resigned. Former Commissioner Colette Honorable left the agency at the end of her term on June 30, leaving just LaFleur on the panel.

The White House has also tapped Democrat Richard Glick to the commission and longtime energy lawyer Kevin McIntyre to serve as chairman. The Senate Energy and Natural Resources Committee will hold a hearing on the nominations Sept. 7.